This Rpi 3b has been there for me, anything that's grabbed my interest has worked on it. seedbox, compile binaries for my kindle, samba server, provide bluetooth to my main PC, VPN, WiFi access point to my DS, DNS server even a printer server.

Now it's sort of an additional screen to my main PC through X11 forwarding and input-leap.

doing anything with the GPIO is in my to-do