How is the battery doing? I find sudden rechargeable battery/controller failures in the 5-10 year range to be my most common cause of upgrade or repair.

Kind of luck of the draw on that one, I think. I have a first-gen iPad Mini on its original battery around here somewhere. Doesn't run for more than a couple of hours on a charge, but it also hasn't exploded yet...

It usually lasts 3-4 sessions. I power it off between uses to preserve battery.