Re: He doesn't get it.
"As a pensioner who retired in 2002, I find electronic communications extremely useful"
So it works for your use case. Fine It would work for mine. It wouldn't work for everyone. Even here it wouldn't work for SWMBO because she very rarely looks at email. She also very rarely turns on her mobile so SMS wouldn't work either. Snail mail and POTS work very well.
Thinking that because something that works for oneself works for everyone is a trap into which tech enthusiasts are liable to fall. Hancock is so entrapped into it that he doesn't realise it and, frankly, I doubt he'd believe, or maybe not even understand, anyone who tried to tell him.