Profit share is a poor measure because it's reliant on expenses, and those are notoriously easy to massage - companies do that routinely for tax purposes. Who's to say what's a cost and what's an investment?

If you must, at least attempt to include accumulated value as part of the equation - so that "fake" costs that are actually investments appear as increases in company valuation. Of course, this still looks good for apple :-), but given the volatility of share prices and what that says about how easy it is to determine "value" it should be clear that the one thing these comparisons cant' be is clear.

Judging the success of Apple by its profit share is like judging a baseball player by his salary. I get that if you personally identify with the baseball player and want to see him have a nice life, but I think the most important metric for a baseball fan is the extent to which he helps his team beat the other teams. The only thing Apple wins is the mindshare of relatively wealthy (American) people and an enormous amount of hedge and institutional fund investment. It's an easy buy in an extremely precarious, but bullish, frothy economy and if it tanks it'll 1) start slowly, and 2) you won't get fired, because everybody's doing it.

  The only thing Apple wins is the mindshare of relatively 
  wealthy (American) people and an enormous amount of 
  hedge and institutional fund investment. 

So they're only dominating in terms of profit share in wealthy countries. And also in most if not all customer satisfaction and retention metrics. And also killing it at retail.

But other than that, not dominating at all.

I hope I can achieve this level of non-domination in my lifetime. Seems pretty cushy.

Market share matters.

Apple were doing well by profit share in the PC market in the early 1990s when they were as now a bigger company than MS. But because there were so many more PCs out there software developers and hardware manufacturers targeted MS not Apple and then when Apple machines were poor in the mid to late 1990s Apple almost disappeared.

If Android is, say, 80%+ of the market at some point and it's no longer worth making things for iOS Apple and Apple have a generation or two of stuff that isn't that good Apple could be in the same position as they were in the late 1990s and it's unlikely Jobs will be back again to save them.

While this is true I think there are some differences. In particular, an essential sector of the Mac death spiral was people switching to cheaper Windows PCs as soon as they were a good-enough alternative. For various reasons https://news.ycombinator.com/item?id=6496030#up_6498257 I think iOS devices have a better chance of sustaining a lifestyle-brand price premium without losing too many users even if the alternative is broadly good enough.

Wow, no. That is not my logic at all.

Lambo is profitable, evidently, but they have an absolutely miniscule share of the auto industry's profits.

Profits, profit margins, and profit share are related but really distinct things. I hope nobody lets you run a business!

Profit margins != profit share.

What was the 2010 MBP made from? Do the unibody ones fare better than the plastic models? Were you typing so fast that the keyboard caught fire? Are you Superman?

Answers in order please.