I actually did use one of my Raspberry Pi(s). I have a small shop, and I used it to run a in-house developed Point of Sale system. It has been running for a year no problem. But I’m not using them as a hobby, even though I really want to mess with them.
At the very least you could run useful network services on it (pi-hole ad blocking, a local NTP server, etc.)!
I actually did use one of my Raspberry Pi(s). I have a small shop, and I used it to run a in-house developed Point of Sale system. It has been running for a year no problem. But I’m not using them as a hobby, even though I really want to mess with them.