Here's something interesting, the Path of Exile team have put out a news post giving some answers to questions from the community and it has some interesting bits in it for us.
What is Path of Exile? It's a pretty popular online Action RPG, set in a dark fantasy world. Going by the numbers on Steam, it regularly sees a player count well above sixteen thousand people playing at once.
In the post they said this about Linux support:
Do you have any plans on implementing Ubuntu support? Currently it's too hard to run PoE on it.
I would like to add Linux support for the game client (the game servers actually already run on Linux, as it's what we use for our online infrastructure). It's a difficult project to prioritise because such a small slice of our playerbase runs Linux on their desktop. I switched from Linux to Windows in 2006 to work on PoE, so I appreciate how important this would be for those players.
As for the question about implementing Vulkan, they simply said a very clear "Yes.". You can see more in the official post.
One thing that does bug me, is the reasoning of their own playerbase only having a "small slice" that run Linux. It's kind of a 'well duh' moment, since the game isn't actually on Linux they can't realistically expect to see many. I'm well aware of course that our market share isn't huge but what do they expect?
At least if/when it does gain Vulkan support, those running it with Steam Play or Wine should see a better performance. If you want to see it on Linux officially though, now might be the time to let them know.
Hat tip to "PoELinuxFan".