Currently rocking an iPhone SE 2020, it's chugging along nicely and I've yet to run into any performance issues. That may be due to me basically only using it for music, navigation, and call/text though. I also have the screen set to greyscale so as to dissuade me from using it for much else.
If I were to get another phone, I'd probably consider one of the RAZR series, but I'm starting to err toward getting a dumbphone if I'm able to convince people to be okay with me not having iMessage. Unfortunately, Apple products are kinda the default expected phones around here, and most of my friends have iPhones, so iMessage is almost a necessity for things like functional group texts.