I had an Amiga 3000 UX. These were made for a government contract, I think only about 3000 were sold in the retail market.
It was a full licensed implementation of AT&T SysVr4 on 150 MB 8 track tape as I recall. Really very lovely and stable. But the graphics implementation didn't take advantage of the Amiga's custom chips so X was dog slow.
We ran a diku mud on it called Roma Mud. Did uucp, internet mail gateway, ftp. river.uucp, later river.grand-rapids.mi.us.