I would disagree; "Better Platform" != "Supported Platform".
While it is an admission Linux gaming was hardly going to take off on its own from a cold start, it allows people to use the platform that makes more sense for them. With the increased capability of Linux+Proton as a platform, its horizons are pushed and it makes more sense for more people.
The only possible downside here is the potential for a developer to neglect Linux support now that people "can just run it in proton", netting Linux users a couple losses of what-would-have-been native ports. However, I believe the increase to the viability of Linux gaming overall makes up for it.
While it is an admission Linux gaming was hardly going to take off on its own from a cold start, it allows people to use the platform that makes more sense for them. With the increased capability of Linux+Proton as a platform, its horizons are pushed and it makes more sense for more people.
The only possible downside here is the potential for a developer to neglect Linux support now that people "can just run it in proton", netting Linux users a couple losses of what-would-have-been native ports. However, I believe the increase to the viability of Linux gaming overall makes up for it.