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!