First off all, it's a legitimate way. He just goes through the install instructions from here (https://github.com/termux/termux-x11).

The one thing I would do differently is choosing the right package for your architecture or going with the universal package instead of the arm64 package as he proposes.

Lastly I want to add that that depending on what you want to do a graphical session is sometimes not necessary. Example: For tools like mov-cli for watching movie in the terminal, termux alone is enough, because they integrate with the android mpv app and don't need a xorg session to display graphics.

I don't expect them to switch. I think it's more likely they will stay until there games are no longer supported. Simply because a lot of people just don't want or can't edit the registry, because they think stats for people with technical knowledge. But I also don't believe they will all switch to Linux.

Maybe 43% have hardware that is not supported by Windows 11. And don't want to run windows 11 on unsupported hardware or go through the hassle of even installing on unsupported hardware.