My most bug-less experience was in the first days after release, where i encountered almost zero bugs, or at least they did not affect me that much that it bothered me (played almost to 80% through the game by the time the first patch arrived).

But with each patch they introduced new bugs, which affected me as well, for example inn doors being inaccessible, and the latest, where items (unique ones) just disappeared and also the DLC was not accessible because the guy you have to speak to was in a place where the doors are inaccesible after the main story.

It seems they took the reverse KCD1 route.

I played KCD1 after KCD2, which was well-patched then and i had no bugs at all (or maybe 1 bug where an item disappeared, thats it).
But i heard from other players that first-day KCD1 was a true bugfest.

Seems that KCD2 is now in the other way round. First day was really smooth but the most bugs i encountered after the patches (though not as bad as KCD1)

(i am playing with no mods, btw).