I find it mind blowing that ~42% of all cycling deaths are men aged 70+.
It obviously confounds fragility with participation but, still, it must mean that people continue to use bikes -- I'm guessing increasingly e-bikes -- well into their old age.
(42% is 118/281 in the report.)
I wonder how many of those are just heart attacks triggered by the exertion. A member of my family died that way (though they were not that old, and were relatively fit)
I think that if you as 60+ person cannot bike without support your brain is probably also not fit enough anymore for the speed you are going to ride at. So, I advice older people not to use an e-bike. I am not going to use one. Maybe a trike is a safe option at speeds not exceeding 10km/h.