Probably a better camera, new battery, significantly better performance from the chip.
If you’re happy enough with your phone as is then you’re good for now.
I suspect you’re exactly the target audience for this phone though (happy enough to trade cutting edge specs you don’t need for better value - I’m the same).
In any case it’s probably good to know there’s a very familiar drop-in replacement for your existing phone when it gets unusable that isn’t going to break the bank though, right?