I've had a few Safaris and they're easily among my favorites, but personally it was common to get misaligned nibs with them, or extreme variation between two different nibs of the same grind (so I don't think the problem of "getting a bad one" is as unlikely as portrayed). The alignment problem occurs with all brands to one degree or another IME, and it's worth learning to make adjustments using a loupe or macro camera for anyone who's interested in the hobby.
There's also a widespread problem of counterfeit Lamy Safaris out there, which usually come in subtly different packaging and/or have subtly different markings on the pen body. These are widely considered to be inferior, and fairly common if ordering somewhere like Amazon.
This is fascinating to me, as someone naive to the hobby. Can you describe what you're looking for and what adjustments you'd make? Are there two halves of the nib that need to be at the right spacing and alignment for proper ink-wicking or something like that? Does that affect the smoothness of the interaction with the paper too?
I routinely work under a high-magnification dissecting scope to build experimental equipment for neuroscience, but I never considered that people would be doing this to optimized their writing instruments.
Pretty much all of what you wrote is a consideration, but everyone probably has their own preferences (and in some part it's affected by writing angle and penmanship habits). Certain nib styles are better suited to different ways of holding a pen. And there's a lot more to it, since different papers react in different ways to different nibs, and inks are another wide-ranging variable.
I think many people get drawn into the hobby for the endless pursuit of matching pens, papers, and inks, or trying to optimize for various characteristics across different combinations of the above. Of course a lot of people don't bother and just find one that works well enough and leave it at that.
I agree, I've had huge variation in the nibs as well. I did some research on how to polish the nibs a bit and was able to tune the ones that didn't perform as well.
Even the gold nib needed tuning. :(
You should be able to feel a _consistent_ feedback as you write with a proper nib. Two of the three nibs that I bought didn't perform out of the box. And a fine nib was too dry. I bought some brass spacers to separate the tins a bit.
There's also a widespread problem of counterfeit Lamy Safaris out there, which usually come in subtly different packaging and/or have subtly different markings on the pen body. These are widely considered to be inferior, and fairly common if ordering somewhere like Amazon.