The problem is making gaming on GNU/Linux profitable, Vulkan will not fix that, while Proton is not a solution that will work out long term.
> In a 6–2 majority, the Court ruled that Google's use of the Java APIs was within the bounds of fair use, reversing the Federal Circuit Appeals Court ruling and remanding the case for further hearing.
https://en.wikipedia.org/wiki/Google_LLC_v._Oracle_America,_...
> Linux Beats Mac Dramatically In Humble Bundle Total Payments
https://web.archive.org/web/20150415180723/http://www.thepow...
> Linux users pay 3x that of Windows users for Humble Indie Bundle 3
https://web.archive.org/web/20111130182955/https://www.geek....
Old links precisely because it happened before or soon after Steam came to Linux.
Because apparently Linux folks haven't learnt the OS/2 lesson.