I think in the current stable it uses Wayland in desktop mode and a modified Wayland called Gamescope in game mode.

I like not censoring names. Hold people accountable for their words, name and shame. It’s nothing a decent googler can’t find by searching with quotation marks. People willingly put their posts online next to their usernames, they out to stand by it.

Atomic made a great comparison and backed it up. No need to be so stubborn.