A while back, I moved my Mastodon instance from a raspberry pi to a RockPro64 (from @PINE64 ). The hardware is significantly faster and pretty nice, but the software leaves something to be desired.
I've had the most success with Armbian, but at least twice now, they've deployed kernel updates that caused my machine to fail to boot. Re-imaging/etc. isn't a huge deal for my tiny instance, but it is frustrating.