> They are using Linux to avoid paying the licences.

Windows already doesn't charge any license fees for screens less than 9" no?

It may have started out that way but I think with projects like DXVK, Gamescope etc.. it is also about controlling the whole software stack to provide a console like experience. Also allows them to do things without worrying about drivers from AMD or some random Windows update breaking their customization.

Another interesting thing maybe Valve's idea of reducing the friction. People used to purchase their games on steam even when pirated copies were easily available.

Now that there are more competitors to Steam (Windows Store, Epic, Uplay, Orign, Gog, etc...), Valve is creating their own vertical to make it easier for people to ignore those places when buying games.

Eg. I had the option of purchasing a DRM free copy of an old game on Gog vs. the same game on Steam Deck. On desktop, I'd have definitely gone with Gog. but on the deck, I actually went with Steam that day. Still baffles me.