How much has Proton progressed over time to run Windows games under Linux? That's how much:

Toms Hardware is Hands-On With Valve's New Headset and Controllers. Looks like a step up from the Vive but not sure if they have something to justify the price point...

tomshardware.com/news/valve-in

The culture war at the heart of open source • Steve Klabnik

There’s a war going on. When isn’t there a war going on? But I’m not ttalking about a physical war here: I’m talking about a war over meaning. This particular war is a fight over what “open source” means.

words.steveklabnik.com/the-cul

[DXVK 1.0.1 + Proton 3.16-8] Sekiro: Shadows Die Twice.

A quick look at Sekiro: SDT working out of the box with the latest DXVK and Proton (Steam Play). Stable 60 fps when not recording.

youtube.com/watch?v=QuTMEKdwQ-

ValveSoftware releases Proton 4.2. Lots of updates and improvements. Not sure how much it changes the compatibility profile for games that did not launch before, so I guess I will have to do some testing!

github.com/ValveSoftware/Proto

ValveSoftware/Fossilize

A serialization format for various persistent Vulkan object types. - ValveSoftware/Fossilize

github.com/ValveSoftware/Fossi

Here's the framerate of F1 2018 on various video cards from on Linux with Steam Play/Proton: