> Yet they are doing zero to foster native Linux games.
"zero" might be a bit harsh, considering that they do some things at least, compared to others who literally do nothing. Steam the platform has native Linux support, what games are natively available is visible on Store listings, and a bunch of the SDKs (all of them even maybe?) are available natively on Linux too. The situation could have been a lot worse.
It will get more worse, with Proton there is no value in e.g. using Vulkan, just use DirectX, and the convinience of modern GPU programming tooling in Visual Studio, HLSL code completion with CoPilot, PIX debugger, and then let Valve have to worry about running it on Linux.
> with Proton there is no value in e.g. using Vulkan
Valve themselves seems to disagree with you here, considering they still have Linux native SDKs available for integration, and are releasing their own games with native Linux support.
I'm guessing if what you say is true, Valve would be the first to move towards that reality you paint, but we haven't seen that yet, I'm doubting we'll ever see that, but the ones who live will see I suppose :)
Valve will get their OS/2 and netbooks moment if they don't foster a proper native Linux games ecosystem, but yeah lets cheer for Windows games translation on Linux while it lasts.