I'm saving this comment, thank you for a great explanation of what it is like.

I was in my late 20s when I realised I was "face-blind", but I should have realised a lot earlier, I remember reading in a book as a child about how "people can recognise a person by their face from a long distance, but find it difficult to recognise a voice", and I could not relate whatsoever to that passage.

I thought I regularly struggle to recognise someone until they start speaking, but it wasn't until a decade or two later that I read about prosopagnosia and then suddenly a lot of things made sense.

Your explanation is so much better than the rubbish illustrations of blanked or blurred faces, because it isn't like that at all, indeed sometimes I might rely on a detail about their face to recognise someone.

It's why face-blind isn't a great term either, because it's not a kind of blindness, I can see just as well as anyone, it just doesn't trip the automatic and instinctual recognition that I understand most people have.