No I'm not conflating things- Ford and Dodge filter incompatibility is almost directly comparable to a software company making API changes to be incompatible or to choose not to offer something they could easily include. And it's not just Ford and Dodge; practically every car maker chooses to make some parts that are proprietary. Oil filters are a particular easy one to compare to software practices.
Ford and Dodge have ranges of similar size engines with similar flow rates in their cars and trucks (treat Ram as if it were Dodge). They both specify the use of filters that follow industry standards like SAE/USCAR-36 and ISO 4548-12. The ONLY reason that you can't swap Ford/Dodge filters between engines with similar filtration requirements is because each company uses a different thread size and filter interface dimensions. Any company could adopt a common standard and simplify the choices at the auto parts store but none of them do, because they all want to exercise some amount of control. The funny part is, they all participate in creating industry standards and they make very little money off the sale of filters. They also make their specifications available to aftermarket filter manufacturers like Wix and Fram. There is no patent protection on a particular thread size or the diameter of a rubber gasket. There is NOTHING stopping Ford and Dodge from unifying the filtration interfaces in their similar sized V-8 truck engines. Why is this part brand specific? You can buy a range of tires that work with either brand as long as you get the right size and durability ratings. You can buy batteries that work with either brand. You can find a whole slew of parts that are standard and interchangeable across brands, but some parts aren't.
This is equivalent to saying, "these two watches both have Bluetooth, a microprocessor, and touch screen, the only reason one watch works with Apple and the other works with Google is because of the software." Apple could open up their software to allow both watches to work with iPhone. But they don't do it. Apple does allow Bluetooth headphones to work fine with iPhones even though they offer the Apple AirPods. So even in the phone market you have analogs to "certain parts can work interchangeably across brands, but these don't." In the automotive world nobody is complaining about anti-trust, so maybe we need to think about whether Apple's actions regarding their watches is actually anti-trust.
> The ONLY reason that you can't swap Ford/Dodge filters between engines with similar filtration requirements is because each company uses a different thread size and filter interface dimensions.
Which is maybe dumb, but it isn't a problem, because of this:
> They also make their specifications available to aftermarket filter manufacturers like Wix and Fram.
Which is the thing Apple isn't doing, and furthermore is doing the opposite and preventing full compatibility with third party watches even if they would reverse engineer the protocol used between the Apple Watch and iPhones. Which is what makes it an antitrust problem in that case but not the other.
Moreover, the argument you're making is that the automakers purposely cause their filters to be incompatible to limit competition. You're essentially arguing that it should be an antitrust violation in that case. Which is a weaker claim because competition in that space isn't being as clearly inhibited -- nobody is claiming that the incompatibility is impacting the quality of third party oil filters -- but if you made the case that it was then you would be condemning Ford rather than vindicating Apple.
> preventing full compatibility with third party watches
What law in any country requires this? Apple is not a public utility and people don't have rights to access.
> the argument you're making is that the automakers purposely cause their filters to be incompatible to limit competition
No I'm not making that argument. I am arguing that incompatibility is there, could be resolved if the companies chose to. The incompatibility persists and is not illegal. It has nothing to do with anticompetitive behavior. Apple being incompatible with third party watches should be the same- the incompatibility could be changed, but it is not illegal. Just because some people wish things were different doesn't make it illegal or immoral.
Any sane antitrust laws require this. Not that they have to provide compatibility, but they cannot inhibit compatibility. But that's what they do.
> Apple is not a public utility and people don't have rights to access.
Your iPhone doesn't belong to Apple and Apple trying to retain ownership control over it after they've sold it is the evil to be prevented.
> I am arguing that incompatibility is there, could be resolved if the companies chose to.
There are two different kinds of incompatibility.
One is, each model of car has its own type of oil filter, which is an inconvenience but then the third party suppliers just produce all the different kinds, and filters with different specs legitimately should have different interfaces and then you're going to have 100 different filter interfaces regardless and it doesn't matter much if you then need 100 SKUs or 250.
The other is, they purposely thwart compatibility by actively inhibiting third party interoperability, even when the third party is willing to support the vendor-specific interface. There is every reason to prohibit the vendor from doing this because there is no legitimate reason to do it, but a strong illegitimate motive for them to do it in order to inhibit competition.
A strong heuristic for telling the difference between these things is, what percent of the ancillary market is controlled by the seller in the primary market? Third parties being excluded in practice strongly implies malfeasance.
Ford and Dodge have ranges of similar size engines with similar flow rates in their cars and trucks (treat Ram as if it were Dodge). They both specify the use of filters that follow industry standards like SAE/USCAR-36 and ISO 4548-12. The ONLY reason that you can't swap Ford/Dodge filters between engines with similar filtration requirements is because each company uses a different thread size and filter interface dimensions. Any company could adopt a common standard and simplify the choices at the auto parts store but none of them do, because they all want to exercise some amount of control. The funny part is, they all participate in creating industry standards and they make very little money off the sale of filters. They also make their specifications available to aftermarket filter manufacturers like Wix and Fram. There is no patent protection on a particular thread size or the diameter of a rubber gasket. There is NOTHING stopping Ford and Dodge from unifying the filtration interfaces in their similar sized V-8 truck engines. Why is this part brand specific? You can buy a range of tires that work with either brand as long as you get the right size and durability ratings. You can buy batteries that work with either brand. You can find a whole slew of parts that are standard and interchangeable across brands, but some parts aren't.
This is equivalent to saying, "these two watches both have Bluetooth, a microprocessor, and touch screen, the only reason one watch works with Apple and the other works with Google is because of the software." Apple could open up their software to allow both watches to work with iPhone. But they don't do it. Apple does allow Bluetooth headphones to work fine with iPhones even though they offer the Apple AirPods. So even in the phone market you have analogs to "certain parts can work interchangeably across brands, but these don't." In the automotive world nobody is complaining about anti-trust, so maybe we need to think about whether Apple's actions regarding their watches is actually anti-trust.