I’m in a similar situation at 76. Not saying it won’t happen someday, but I feel fortunate that I can still ride my regular bike. I rarely ride with anyone else, so keeping up is not an issue. I’m still riding distances that would drain an e-bike battery. Eventually making it up the hills may be a problem, but I think I can eke out an additional granny gear or two with another cassette. I like my bike too much - and I love the convenience of just tossing it in the back of the car.