It’s not the gotcha that they think it is. Increasing share of Linux, steam deck or not is progress. Any development or considerations made for the SteamDeck and its Arch based OS benefit the non SteamDeck Linux gaming scene too.
Mostly a stab at Reddit PCMR, Lemmy PCMR has a different vibe.
Apple sells Mac computers in part because of the OS.
Microsoft became a monopoly because it beat out most other OS vendors.
ChromeOS and Steam Decks are being sold, in part, due to the OS capabilities to run the software people like.