The last time I checked, the only thing I could find were instruction on how to install the nVidia driver manually. Turns out nVidia has a repository for Tumbleweed! =D
Just to be clear, things do break a little sometimes. But on the plus-side, openSUSE uses btrfs snapshots - every time updates are installed, the system creates two snapshots, one before and one after installing the updates. So if something breaks, one can always roll back to a known good state and wait for a couple of days before giving updates another try.
Thank you so much for making me look it up!