That reminds me, we did an escape room set in a Cold War bunker and one of the puzzles was you had to work out which phone on the desk to use and what number to dial.
My wife & I in our 60s were the only ones on the team who had ever used a rotary phone and according to the staff, they often had to tell people how to use them.
Years ago we rented a vacation home near my folks that had a rotary phone (working). My son, who was probably 14 at the time, had a friend over and I told them I'd give them $20 if they could figure out how to use it to call their Grandma within 10 minutes.
They didn't even get close. Interestingly, they never even figured out that the metal part moved.