I worked on AIX systems when I was first getting into computer work in the 1990s. The software was okay (honestly, Solaris was better imo) but we were running a token ring network and that was buggy as hell. They called them “broken ring networks” for a reason.

But man, I really did love that RISC architecture. It made assembly language feel simple and elegant rather than the cuneiform that was the iteration of the CISC chips at the time.