E-bikes help us to get up and down hills, but the safety issue doesn’t go away. Response times are slower across all sorts of dimensions (detection, response, mitigation, etc.), and an accident is more likely to end in hospitalization or actual death, e-bike or no. Well-traveled bike trails sound like fun, but I think it’s a no-go for general transport for the elderly. You can do it at that age, but I’m guessing the first age-related (higher speed, new technology) biking accident will result in disability/death way too often. You’ll feel like a fool when it happens, because you were. Not the oops you want when bones break too easily and heal too slowly.