My first homebrew wireless AP was an old SPARCclassic with the now-rare SBus PCMCIA adapter and a Orinoco Gold, running IIRC Debian Potato.

Still a very cool form factor, though nowadays beware that the PSU is a cap goop timebomb:

https://users.glitchwrks.com/~glitch/2017/07/24/ipc-recap

I greatly enjoy the Sun3 and Sun4c/Sun4m era, always under SunOS 4. Probably because that's what I started on with my first UNIX account (Grex). Probably why I still prefer the BSD-style distros nowadays.