I've been having a long discussion with a very helpful person from Microsoft Finland. They actually went to get same model of SB2 during our first discussion just to verify that yes, the "latest" drivers that are officially available are dated 2018. After
that we've been going back and forth finding solutions and reasons for why this issue is happening. Also got referred to business support, and multiple people got involved.
Now, like some others have said in this topic,
the only solution that is even remotely workable is to install Nvidia Studio Drivers (DCH version) directly from Nvidia, and to also install Geforce experience (don't know why, they suggested it and it helped with the crashes). Also, DCH
version requires the installation of Nvidia control panel from Microsoft Store, but it's free.
They also got information that Nvidia is aware of some compatibility issues and are trying to fix them as fast as possible. So it seems this is not just on Microsoft. Granted, they should inform users better and push updates through windows update so that
the latest driver isn't showing a date from 2018 in device manager.
I got lucky that after several tries met with silence, the person finally helping me is awesome and willing to go further than needed. They even mailed me after a few days to ask if I still was experiencing issues or were they solved, and kept me updated
on that they haven't stopped looking into the matter. I'm more than willing to work together with someone like this to find a solution, even if it means losing some of my billable hours.
Still. Not entirely happy that I need to do troubleshooting on machine this expensive, as this wouldn't likely happen with say, a Macbook Pro, but it was still enough that the machine is now sort-of working. Meaning I can do my job on it if I just save often.
Which is better than it being a fancy paper weight. So at the moment, I don't have to pursue any legal routes, which is a relief.
I also suspect that this issue is not more widely reported because (maybe?) majority of the users are not using Premiere/After Effects or other heavily affected programs. It seems that Photoshop, Illustrator and Lightroom work just fine regarding this specific
issue, and even the new Fresco painting program works mostly without problems.