When I started college in 1993 about half the computer lab were DEC Ultrix machines. By the time I graduated it had transitioned to Solaris and HP-UX.
I had a summer internship in 1995 and the Win 3.1 machine was so unstable for running an X server to the Suns, 3270 mainframe emulator, and browser using the Win32s (environment for running 32-bit application on 16-bit Win 3.1)
We found the supply closet with over 200 old 486 machines. The other intern and I installed Linux on some and it worked far better than the Win3.1 setup. The older guys saw it and wanted one too. We set up an assembly line with a Linux NFS server with the Slackware disk images to avoid swapping floppies. At least over a 10 Mbit network we found the NFS performance to be fine.
A couple of years later at my job after graduation I convinced our manager to buy PCs to use as X terminals with larger monitors and move the Suns to the closet for the chip design jobs.
I remember having some NFS issues and Trond Myklebust (Linux NFS guy) had me trying some NFS version 3 patches that improved performance between a Linux client and Solaris server.