I adopted Linux in college in 1993 and, like many peers, brought it to my R&D job and observed this wave of expansion through the mid to late 90s. Linux was already "going somewhere" in 2000 for IBM to even notice it. Lots of federal grant money was directly or indirectly improving Linux due to FOSS folks like me.

It was getting so much commercial and academic engagement that we had the idioms (cliches?) of the "LAMP stack" for basic web servers and "Beowulf clusters" for high performance computing. Even SGI was already revealing a Linux plan, before 2000, when they still seemed like a fixture of the HPC industry rather than an also ran.