I’m not a 13 Mini owner, but I might be after my SE1 becomes unusable. Still trying to decide between a 13 Mini and the new SE as the eventual successor. I don’t really like either option. I would rather pay Apple $50 per month to keep my SE1 functional forever.
But if I was already a Mini owner, my plan would be pretty much the same: keep using it until it loses app support, then see what my options are. I’d most likely just go with the smallest iPhone available, though I would strongly consider leaving the iPhone if there were other compelling small phones. I’ve often toyed with the idea of getting a Lightphone, though losing that much functionality would be pretty extreme. And it would be hard to leave the Apple ecosystem, so my other thought was to get an iPod Touch (if it gets updated) and use that tethered to some other phone. And keep both of them with me all the time. As you can see, I’m getting pretty desperate and not making a lot of sense.
Edit- actually if the other phone is a Lightphone, an iPod Touch and a Lightphone shouldn’t be too much to carry around. Hmmmmmm……..