If you ever wondered why I spent ZERO time and effort playing with Windows EVER any time in my life, this guy explains my world.

Air Traffic Control, for example, uses X11 protocols for display management.

Military systems use linux servers, and you might find X11 in their development labs (which are air-gapped from the outside world, of course).

Gas Turbine Engine systems use this technology.

Cell tower communications developers use all linux as their operating system.

Process control systems (paper mills, chemical processing) use linux as both development and target embedded operating systems.

Missile launch systems (including space shuttle) use large parallel linux based scientific computing clusters.

So this guy is speaking the bread and butter of what is on my desk every day. Display server, display manager, window manager, compositor, etc, is a choice for every node a linux engineer installs.
This guy is a typical example of the kind of people I have always worked with on a daily basis. The way he approaches problems, the way he speaks, his openness to alternative solutions for diverse use cases – all of this is what a typical engineer does daily.

Windows never had any role in any of that world. Windows was a toy sold to its victims of millions of idiot consumers. His talk is fascinating. I personally prefer KDE Plasma and Mate as desktops for PC’s. And I am experimentally switching to Wayland.