It's primarily only the AAA multiplayer games that have that, not just AAA games in general.

Just browse the Deck Verified page for example: https://www.steamdeck.com/en/verified & https://store.steampowered.com/greatondeck/

Forza Horizon 6 and Assassin's Creed Black Flag Resync'd are both listed, and both are very recent, major AAA game launches. With top-tier Linux compatibility.

It is staggering how different the situation is now as compared to just a couple years ago. Steam Deck (and associated investments by Valve) are damn near a revolution. It's a perfect storm of the incumbent turning to shit at the same time the underdog really got its act together.

If you or your friend group is really into a game that doesn't have Linux support yeah that's a bummer, especially when it's just because of the kernel level anticheat that's horrifying in its own right (triply so when it's for a PVE game, cough cough, helldivers 2, cough cough). But I don't think that's most people anymore. The more casual and indie game scene these days is huge, and of course single player games in general continue to be super popular.