It's greatest quality seems to me that the whole screen looks accessible with one hand. I own an iphone 12 mini. Not sure what to replace it with when it dies.
I'm in the same boat. I've been looking at foldables, especially the latest Motorola Razr series. The outer screen is about 4" diagonal, which should serve most needs for one-handed use; and it expands into a modern phablet size if you need the extra space. Haven't got one yet (my 13 Mini is still going strong), but when I need to upgrade, I'll probably give a foldable a shot.
I read the apple’s response is a foldable which will cost $2000. I did queue in front of the apple store many years ago. But there is no way these days I will spend that kind of money for functionalities I don’t use. Even an iphone 12 mini is an overkill for what I do. I think I will stash a couple of 13 mini. That will give me a good 8 years!
Hahah, personally I can't wait to go back to Android :) I've found iOS to be a pretty miserable experience. I only got a Mini because it was the smallest phone on the market. IIRC Motorola's Razrs run like $700-1200 depending on what spec you get.