While previously you've been able to play League of Legends on Linux, and there's some pretty die-hard fans using Wine to play it, that's set to end soon with Vanguard being introduced.
This also applies to Valorant. I know a lot of people look down on both games, but it's still unfortunate for Linux to lose access to such a popular game.
I thought this part was particularly interesting:
Half of anti-cheat is making sure the environment hasn't been tampered with, and this is extremely hard on Linux by design. Any backdoors we leave open for it are ones [cheat] developers will immediately leverage for cheats
Depends also on their definition of cheater. If they count the mindless weak bots that keep playing just to farm currency in non ranked or if they only count serious cheats.
League just doesn't have that many 'traditional' cheaters and the game lends itself to server-side AC way more than most. The cheaters in League are more often win-traders at high elos and smurfs in low elos. Also lots of feeding and trolling. So I have no idea why they are adding Vanguard, a good reason to stop playing the game though.