Making a linux native version of a game today is just wasted effort. Just make sure it runs well with wine/proton and you are golden.

The original Cities Skylines shipped with a Linux native version on a time where Proton was in it’s infancy.

The problem now is that it’s just better not to do a Linux native version. Linux native ports have libraries that usually is old and not often backwards comparable. So many native Linux ports that are old just doesn’t work on modern Linux distributions (unless you manually find and add the library version).

The Valve solution removes all headaches from the developer (and make it easier and simpler) to just make a Windows version, plus the added bonus to relay all issues with Proton on the game to Valve support. This is huge for game developers as not all developers are good at giving support on Linux about Linux (most of the ports are made by a third party).

​

So to answer OP question, if it will get Ported to Linux then I am all for it but I believe it’s just better to use Proton as Gamescope has some features that makes more parity with Windows features.