I regularly replace my screen 1-2 times between iPhone upgrades, and have never kept one until end of security update support. I've never managed to replace an android screen, and have only replaced one android phone that still had security update support (I've only bought flagship androids.)

I replaced my iPhone X this year, with a 15 that I anticipate owning at least another 5-6 years.

I'm still on iPhone X, runs super smooth. The older iPhone X runs better than my test Galaxy S20 which is newer than the iPhone X by many years.

I also have a Galaxy Edge from the same year as the iPhone X. The Samsung is completely unusable. Every tap takes seconds for anything to respond.

The accelerometer on my X finally started failing, making it impossible to hang up voice calls. It wouldn't turn the screen back on after I took the phone away from my face :-D