[waz0wski]

I keep a SPARCStation 20 around for some nostalgia

NetBSD still supports it, and a wide variety of other SPARC systems https://wiki.netbsd.org/ports/sparc64/

[rjsw]

There are semi-regular posts to the NetBSD port-sparc and port-sparc64 mailing lists from people looking to find new homes for SPARC systems.