Lol, I don't need launchers for my launchers. Gimme a call when I can play all of my Xbox games on PC.

No thx, I don't need MS spyware on my linux distro.

Is Valve spyware okay tho?

It's not a launcher. It's a whole new UI, basically like SteamOS's Gamescope.

As a Steam Deck user, SteamOS is really missing this. Downloading GOG games without entering Desktop Mode would simplify things a lot for me.

So it's a UI that launches games, what some would call a launcher, and when you launch games from other launchers, those launchers will launch from this launcher. Sounds like semantics to me.