I wonder how many other people there are out there like me. I used to be an iPhone user, but moved over to Android and the Pixel line initially quite a few years ago, before moving to a OnePlus 7 Pro about a year and a half ago now.
However, I've been considering moving back to iPhone. But there's no way I'll do so unless the iPhone has a 90hz or 120hz display. I get that some people might not notice the difference in going from say 60hz > 90hz, but for me it's a night and day difference, and moving back to 60hz would be a regression for me. To be fair, moving from the full screen, notch free display of my OnePlus 7 Pro back to the iPhone's notch would also be a regression, but that's a sacrifice I'd be more willing to make.
I just think, as others have said, not implementing a 90hz or 120hz display, even if you only did it on your 'Pro' range of phones, is laughable. Especially when you consider how long this technology has been available elsewhere.