[gambiting]

Native doesn't automatically mean better - quite a few examples of games running better on proton than with native executables(and yes then we can start arguing that it just means the native port is done poorly, but I'm just saying don't assume native will always run better).

[keyringlight]

It seems like a similar argument around the popularity of third party engines, whether studios should use Unreal, or whether they have the expertise/resources to change to and use another engine, or make their own bespoke engine, and if that will produce better results.

[nicce]

I think that is not fair comparison. Proton adds additional layer which can be completely removed and affects the runtime performance. Switching different game engine changes the layer implementation, instead of removing.