65 here, been cyclocommuting for going on 25 years, switched from 10 speeds to 3 speeds in 1999 for a retro feel and because I find 3 speeds more comfortable for in-town use. Currently riding a 1965 Rudge. I come from a family with no history of health problems. Advanced hobbyist, do my own repairs-invested in a Park Cotter Pin tool years ago, a wise move. Build my own wheels. Use generator lights, find them more satisfactory. Live at the top of a good sized hill.