These feelings aren't mutually exclusive. I'm often like "I have no memory of this place" while my name stares at me from git blame, but that doesn't mean my intuition of how it's structured isn't highly likely to be right in such cases.

There is probably a bias here, because you notice the times where the code is unfamiliar more than the times when it’s still familiar. You wouldn’t go “huh” if not remembering was the normal case. If it were, you’d rather go “huh” if exceptionally you do remember.

It feels like that at first, especially as I get older. But I still think it comes back to me a lot quicker if I once understood it than if I was learning it from scratch. Possibly just because I know how I think.