In the Panhandle, for example, there is a mixed use bike / walking path. It is very dangerous for the walkers even with normal bikes, as the bikes are whizzing by the walkers at 20mph. However one day I was walking, and a HUGE mutant E-bike with massive fat tires & very heavy frame, flew by me at what seemed like 30-40mph -- and to me, it felt exactly like a near miss from a motorcycle.
There are other safety concerns with recent trends, with the Slow streets. Everyone walks in the middle of those streets & the pedestrians treat them as their exclusive domain: kids playing, etc. But the drivers long ago stopped respecting the "slow street" concept, and whiz around the traffic cones, and then go 30mph down the street. The city is still treating them as an experiment, which is a part of the problem.
I love both E-Bikes and the Slow Streets, and they should be a huge part of our future: * Cities should make the Slow Streets official and modify them to make them impractical to use for driving a car (perhaps making them have a single curving central lane). * Likewise the E-Bikes need a bit more regulation and limited strictly to bike only lanes, not the mixed biking / pedestrian paths.
As it is currently the progress of society and technology has created a bit of a dangerous situation.