Frequent Crashes in Unity 2019.2.18 and 2019.2.19 (but not in 2019.2.17)

I'm currently reverting from 2019.2.19 back to 2019.2.17 (hopefully this won't be too much trouble, either 2019.2.18 or 2019.2.17 did a full library re-import) and I also have already filed a bug report on this:

(Case 1214002) Frequent Crashes since Unity 2019.2.18 (but also in Unity 2019.2.19

I believe 2019.2.17 ran quite stable for me: The only crash I have seen sporadically for quite a long time was one while closing Unity. So while annoying, that one didn't cause major trouble.

But ever since I upgraded to 2019.2.18, Unity crashes quite frequently in the middle of various operations. 2019.2.19 didn't fix this, probably even made it a little worse.

I have seen crashes while saving a scene, closing a scene (which probably includes saving a scene), entering play mode. This is a Virtual Reality project but I also saw these kinds of crashes when running it without VR (I frequently change between SteamVR, native Oculus, and non-VR).