Slackware and Red Hat were the two distros in use in the mid 90s.
My local city used proper UNIX, and my university had IRIXworkstations SPARCstations and SunOS servers. We used Linux at my ISP to handle modem pools and web/mail/news servers. In the early 2000s we had Linux labs, and Linux clusters to work on.
Linux on the desktop was a bit painful. There were no modules. Kernels had to fit into main memory. So you’d roll your own kernel with just the drivers you needed. XFree86 was tricky to configure with timings for your CRT monitors. If done wrong, you could break your monitor.
I used FVWM2 and Enlightenment for many years. I miss Enlightenment.