When I was a kid, most photos were in black and white. I guess because colour film or developing was more expensive, the photos my Dad took were usually monochrome until the mid '70s or so. We didn't have a colour TV until 1973. I still watch black & white films on TV quite often.
What I've never understood is why we can accept monochrome photography. I can happily sit through an old film without even thinking about the total lack of colour, yet real life doesn't look anything like that. If you saw a monochrome Humphrey Bogart in the street on your way to work, you would stare at him for a long time.
Is it due to a sort of conditioning? Is it because newspapers, old TVs, old films have taught us to accept it? Is it stranger for young people than it is for us?