I don't think that's the case, and as somebody who's flipped between winphone, android and iOS over the decade here's why:
- For a long time I switched to android because the new usability features were always on android first. But iOS caught up by creating some of their own features, and stealing others from android.
- Android is hit or miss for support after 18 months, my "premium" Pixel C tablet became slow and barely useable after 12 months of updates, even after a reset it was slow - then stopped receiving updates after 2 years, even security ones... so now it's a security risk. My base model iPad is the same age and still getting updates, app store apps still work for it.
- Consistent level of bloat... I won't call iOS bloat free (it's definitely not), but I don't have bloat installed that competes with the OS features. When I tried Samsung, I kept having to disable new samsung apps that replicated google play features baked into android (because play apps were a requirement at one point to license Android, not sure if that's still the case)
- Many people on iPhones that I know aren't on the latest and greatest... they wait several iterations to upgrade. Android, not so much (although they're usualy half the cost so why not?)
- People use Macs, Apple TVs etc, things like the built in password management features make it pretty easy to move from one to the other. Same with photos and files.
- Parental controls - it's so damn easy to control screen time for my kids iPads, and what they install. That's baked in, on Android I tried several parental apps (paid for!) and they never worked right on any of the various phones / tablets in the house.
Anyway, I'm currently on an iPhone 11 but I didn't buy it, it was gifted to me. I won't be upgrading until this one dies or stops getting updates. I also won't just be buying an iPhone as a replacement, I'll look around.
Edit: I should mention I agree with being able to have different web engines on iOS - I'm a firefox user, I'm not a fan of the kneecapped browser on iOS.