I tried the iPhone, all people around me uses iPhone, but personally when I bought 13 pro, I misse the clipboard, swipe language in Arabic (on ios 16 it wasn’t available for arabic language, many many software features I like in One ui. The only thing I want from iPhone is Apps quality + siri shortcut (many apps support it).

If developers support Android like iOS, I’ll never think about iOS at all.

I’m sure the battery is better in S23+ than your S21 ultra. But don’t do it if you don’t need it.