No non-x86? Really? You must have worked with SPARC machines in the early part of your career, no? I had one (Sparcstation) at my desk, 1999, 2000 and all my work deployed to a cluster of Solaris SPARC machines. My first (non-hacked) Unix shell account was on an HP-UX machine in my sister's electrical engineering lab that she let me log into (thanks sis). And my roommate had a hot sexy DEC Alpha box. And of course there were personal machines like PowerPC and 68k Macs, and I owned a 68k Atari ST, and 6502 VIC-20, etc. There was actually a fair amount of diversity up until about 2005, 2006 or so when x86 just finished eating everything and Apple was the last holdout and then switched to Intel as well.

But minicomputers and VAXes generally, they were goners before the mid-90s.