I started with FreeBSD, Fedora, and Debian, and was comfortable on all three. I’ve run OpenSolaris and NetBSD in the past too. I experimented with Nix OS recently but decided it wasn’t my style. I currently have machines with Manjaro and various Ubuntu distros, Windows and Mac OS.
Where do I fit on your scale?
Rather US centric view there. What’ll happen to the majority of the world’s population?