Love the last line, what Valve has done on Windows emulation is herculean, I don't know (it would be great to know) other businesses creating/investing in incredible and risky third-party compatible technologies to run their real business on top of it.
I worked in what other calls "Adversarial Interoperability" [1] but the scale of Valve is on another level.
[1] https://www.nektra.com/main/2020/01/12/reflecting-on-16-year...
On the hand at one point the emulation layer becomes the target. Hopefully game developers will realise this and start using native Linux technologies before they are tied to a single companies abstraction layer. Again.