I don't think the kids these days know that UNIX exists.
UNIX is also basically irrelevant unless you are talking about macOS technically being UNIX, so I agree with the kids.
The idea that Linux is a monoculture is also hilarious to me. That umbrella includes things like RHEL, SteamOS, Bazzite, Android, Chromebooks, Gnome, KDE, dwm, i3, your robot vacuum, car infotainment systems..."Linux" is the exact opposite of a monoculture.
As owner from Red-Hat and Linux contributor since 1998, IBM isn't certainly blocked by choice, they also have Linux for the same architecture, which Aix customers could switch to and don't.
I mean, AIX essentially _does_ not exist unless you happen to work in an enterprise or are in a similar environment that has it. It's not something to easily get your hands on – esp. not "as a kid".
UNIX is also basically irrelevant unless you are talking about macOS technically being UNIX, so I agree with the kids.
The idea that Linux is a monoculture is also hilarious to me. That umbrella includes things like RHEL, SteamOS, Bazzite, Android, Chromebooks, Gnome, KDE, dwm, i3, your robot vacuum, car infotainment systems..."Linux" is the exact opposite of a monoculture.