Like some old timers around here, I was using UNIX professionally since 1987, and had to use a modem over metered calls from 1989 to learn more about UNIX.
I heard about Minix, and was following the Usenet group for it, when I saw a post by a student in Finland called Linus. It was not ready for installation on PCs.
I looked for other options, such as the various UNIX SVR4s from the likes of Dell and Everex. They required an expensive tape drive. CD-ROMs were not yet popular in the early 1990s.
Then in 1995, I bought a CD set which has a bunch of Linux distros, from Walnut Creek Software. The set included Slackware, Red Hat, and Debian. That was a life changing moment.
Fast forward a couple of decades, I am a full time consultant on open source (mainly Drupal and LAMP), running on top of Linux (mainly Ubuntu Server LTS). And I am typing this from my main laptop, which runs KDE Ubuntu.
Thank you Linus, and thank you Ian, and a few thousand more people who made all this possible.