Comment by Unit327
11 hours ago
A NAS is just an example, here's a better one; I love to use my old phones as wall mounted displays and controls for home assistant, or as remote music players plugged in to some speakers that I can hook into in music assistant. Some of my old phones are more than capable of this hardware wise but are locked to older versions of android and can't run anything built for a newer version, so they end up as ewaste intstead.
I think my next phone is going to be a fairphone or something for this reason.
You can do this but you have to remove the battery and hook up the circuitry to external power. This practically turns the phone into a glorified SBC. It may still be worth it since there's more of a mass market for phones than SBCs (and phones come with lots of extra hardware components that can be useful) but it's not that huge of a win.