To clarify - my sites are spread across a private server and thirty or so other hosting companies' shared hosting...
...as to a rollback, I fear not. My belief is that what they have done at Google is too complex to be reversible - and bear in mind they are committed to developing tools like LSI and AI. To admit it went wrong would cause a loss of face, I think....I don't see it happening. More tinkering, maybe.
And with more tinkering comes (IMJ) less control. Every time they patch one leak, another bursts elsewhere, like a tyre that eventually becomes more patches than rubber, and then finally explodes in chaos as you career along the road.....LOL