They probably assumed from Witcher 3 it was mostly fine. I played a fair number of hours on PC, I think the second (maybe 3rd) time it crashed for me was when I was playing the dlc intro, and I don’t think I noticed any horrible bugs. Now I’m not saying they weren’t there of course but this may have all been that reviewers saw as well. Also I think PC was much better on launch than the console so that may have played a big part in it.

I never read many reviews ahead of time to know what promised features were excluded but I’m sure there were a number, so that should have sunk the score noticably.

I would say it’s easily a great game now, but mostly I love the attitude and aesthetics of cyberpunk (the genre) and this was one of the recent games that did that part right.