Even if the users were using a kernel tree that isn’t even in Linus’ tree yet in addition to bleeding-edge Mesa, you still shouldn’t be using nor recommending this.
From the article:
It will take a long time before we get the bugs worked out and get a full feature set with reasonable performance.
We are not, however, yet to the point where you can run an arbitrary app and expect it to work properly.
However, right now there are enough missing features and known issues that a lot of apps won’t work and we already know that. Please don’t file “XYZ game doesn’t play” issues just yet.
This is a large step forward but nowhere near usable for the wider Linux gamer audience yet and that’s just the Vulkan driver.
Other parts of Nouveau aren’t too great either and there is still no re-clocking support. Your iGPU is likely faster than any card with NVK right now.