Meanwhile in 2000 we only considered Linux good enough to host our MP3 file server and quake for the late nights.
All our production stuff was being deployed on Aix, HP-UX, Solaris and Windows NT/2000 Server.
Likewise most of my university degree used DG/UX and Solaris, when Red-Hat Linux was first deployed on the labs, it was after the DG/UX server died, and I was already on the fourth year of a five year degree.
Well we were a small startup, and the idea of using AIX was a non-starter. Solaris was lovely, but our E250 was only for mail, and in hindsight we should have stood up a FreeBSD server with dovecot or something instead of a system that we migrated off of a year later.
We did use NT/2K internally but that was because we had some who insisted on using SMB via Windows.
Such fun times. The nix and nix-like OSes were spreading like fire. I never would have thought I'd ever wrangle them for the majority of my career.