Most old men have crewcuts and the wife can easily run some clippers over them in less than a minute and I suspect now that they have the clippers in their possession, they will continue to use them. Not good news for the Barbers.
I have a good thick head of hair which I have let grow to about 12" long. Also it has grown quite a bit at the back. very much like William Hartnell in Doctor Who. About six months ago I decided to grow a beard along with a handlebar moustache and I will probably keep it all. Again not good news for the Barbers.
I keep in touch with my friends on Zoom and quite a few have let their hair grow out past the "awkward stage" and most of them reckon that they are in no rush to visit a Barber.