Prison Architect 2 from Double Eleven and Paradox Interactive was recently revealed with an entirely new look, and while the original has full Native Linux support, the sequel will not.
Not to mention, as stated above, native ports are often not maintained so when the libraries required for them eventually break API, proton is your only option anyway.
If your stuff runs on Proton with minimal performance penalty, why put resources into not-proton?
Not to mention, as stated above, native ports are often not maintained so when the libraries required for them eventually break API, proton is your only option anyway.