I'm personally loving this latest move by Valve. Adding the Proton compatibility layer, in itself a modified fork of WINE complete with DXVK, is IMO a great move. While we have to keep in mind that Valve aren't exactly 'friends of Linux' and obviously this is a clever business move in an attempt to break the Windows monopoly in order for Valve to put more of their eggs in alternate baskets, it's great to have a big player in PC gaming provide such a big incentive for Linux gaming as a whole. So far I've tried a stack of older games ranging from Stalker through to EA Red Alert 2 classics through to the titles supported by Valve themselves and most games have been as simple as opening the native Linux Steam port (no Windows Steam necessary), installing the desired title and hitting play - Basically when playing my games I have no idea that I'm not running native Windows until I exit the game by clicking 'Exit to Windows'. Performance so far has been fantastic with no fps drops under 60fps. I've uninstalled Wine and Lutris for the time being. Here's a quick video of me launching and playing Doom 2016, excuse my ugly mug and work shirt, for some reason I just cannot get the camera to focus on the display's - But you get the idea.