Please tell me one bug in any previous Insider builds that has had such an impact to functionality of Windows that it has made it not suitable as main OS. No "I think there was this..." or "I don't remember what it was but..." and such, I am asking about a factual bug.
So, it does depends.
Copy progress indicator missing was one of the worst bugs but even it had no effect in Windows functionality. Files were copied.
The rest of you list falls in that category I hoped you would avoid, "I think there was this..." and "I don't remember what it was but...".
So, sudden Windows restart is only in my imaginary?
And, BTW, there were no " I think", "couldn't remember" etc in my last post.
Auto-updates which would all-of-a-sudden restart your system while you were in the middle of working on a document was absolutely unacceptable. And yes, it did happen.
Nothing is BUG free! Take or leave, and please remember, these are preview builds, my friend!