I’ve got one of mine showing album art for music I’m playing[1], one with an e-ink display that shows which subways are leaving soon near me, one running Homebridge for a variety of sensors[2], one for WireGuard and Pi-Hole, and one to run Klipper/Mainsail for my 3D printer. I guess these are all tinkering as well but they’ve basically been running 24/7 for a few years now!

[1] https://github.com/aaronhktan/rpi-albumart [2] https://github.com/aaronhktan/vesta