Feedback to my knowledge has never been the norm. 20+ years ago we were advised to simply state that we wouldn’t be making an offer and move on. The problem as related to me is that the company doesn’t want any liability around providing feedback (e.g. “ we didn’t think you were a good at CSS”) only to wind up with potential legal actions later.
I agree that not getting feedback is *hard*. It means there is no closure, no ability to think about what really went wrong and correct it (e.g. did I mess up? Did the interviewers mess up? Was the process wrong? Was one of us just having a bad day?).