You're extrapolating by saying people like me expect the software to be perfect.
But I'm not the one at WWDC who said Metal would make animations 1.6 times smoother. I'm the one who saw it actually get less smooth and objective measurements support what I saw. So you can say they can be imperfect all day long, but don't say nothing they said was false.
And if nobody's allowed to talk about performance anymore, that's fine. I can talk about bugs too.
https://www.youtube.com/playlist?list=PLVQFi5tAhOgeBCheLWnovZExMXFRhQnu-
You'd think from 9.0 to 9.2, they'd be able to fix at least one of these. That would be reasonable. That might even be something a perfectionist would do.