For anyone using this method as opposed to Ubuntu's graphics-drivers PPA, Nvidia on Thursday released a non-beta 575 driver for Linux, version 575.57.08. I haven't yet installed this, but plan to this weekend. I've been running the previous beta driver, 575.51.02 from Nvidia's own package for several weeks now and haven't had any problems with it, OTHER THAN having to use the open/MIT license version as noted above, rather than the proprietary license version. That's one person and anecdotal, so take it with a grain of salt.
Since originally writing this post, I've installed it and given it a quick test using Cyberpunk 2077 as it's the game I have with the most feature support. One run with all RTX and AI features on, one run with no AI features, but RTX ray tracing on, and one run strictly rasterized, no raytracing, AI, or any other RTX feature. No problems, but again, very small sample size.