I do notice the same. In our hall, in less than 18 months five in the over 70 age group have died. That's five out of 70 publishers. I just counted up that there are 15 more in the 70 plus age range still attending or listening on the phone link up.
With 3 exceptions - an 80 year old woman who DID go to college before becoming a JW and who is "up-together" and cheerful and a couple in their late 70's who seem healthy and "jolly" - they are all miserable, ill or depressed.
They know in their hearts that the 50 to 60 years some of them have been JW's has put them no nearer to the new system they were so convinced of walking into.