Valve has been doing amazing work putting money into Linux gaming, funding open source projects and showing that it's a viable option for quite a while now, and it's starting to pay off.

The only issue (and it's not exactly a real one) is anticheat support for some mainstream tentpole games, like Fortnite, GTAV, Valorant... Devs could fix that if they wanted, but until they do some people won't make that jump. Someone needs to wave some money in front of some game studio execs to entice them aboard.