nyan_kas

Proton.

It allowed me to ditch Windows for good. Playing games on Linux, often with similar or even better performance than on Windows, was an insane idea ten or fifteen years ago. Nowadays it‘s rare to see a game not working on day one. And if it doesn‘t, Proton‘s devs oftentimes fix it within a day or two. It‘s an amazing piece of software with an amazing team behind it.

It‘s the default for Youtube, Netflix and most video conferencing software like Webex, if you‘re using somewhat up-to-date hardware. So I‘d say it‘s commonly used by now.

Nope, it‘s just the exterior design. Valve releases those files to make it easier to design skins, grips and other accessories for their hardware.

If your system is up-to-date, your kernel has probably already been patched. The patch was added to mainline on April 1, and I think every major distribution will have added it by now.