Very young people occasionally end up in my reading clubs and they of course intellectually understand that we didn't used to all carry cell phones, but I remember one specific time someone had a very hard time wrapping their head around the era when landline phones existed, but not everyone had one at home, and so you had to try to get someone at work or call a neighbor to ask about them.

I guess there's going to be more inscrutable things from my childhood the older I get.