Interestingly enough in today's Washington Post there was an article about e-bikes and how they can sometimes be dangerous, too, especially when ridden at too-fast speeds in areas where they are not even supposed to be used at all.
This is one reason I'm not against the "three class" model legislation which makes it a bit easier to outline a couple categories and the rules around them. E-bikes as a category spans the stuff that can get passed easily by someone on a working road bike, to the unrestricted stuff that gets into the range of a gas powered mini-bike. That's a wide swath, to be honest. And I really don't want to see e-bikes as a whole get painted by the brush of folks on the unrestricted bikes causing problems, or the idea that an idiot on a class 1 e-bike is somehow fundamentally different than an idiot on a bike. Yes e-bikes are heavier, but the rider is still by far the bulk of the weight, even more so in the US.
For me, my joints are bad enough that having the assist of a mid-drive helps take some the strain off my knees and lets me go on rides I couldn't otherwise. I would really not want to lose that because of aggressive restrictions in the face of people being idiots.
Thankfully, I don't see a
lot of problems on the MUPs I ride on in terms of user conflicts. But I'm also constantly getting passed by road bikes doing 20mph when the speed limit is marked at 15mph. And there's some fun issues with that where I do see cyclists deciding that yielding is for suckers. E-bikes don't fundamentally make it better or worse, as it is road behavior that's the underlying problem.
I see more gas powered things on our bike paths as a issue. The pandemic brought out so many bad cyclists on regular bikes it was crazy.
I have seen a few small motorbikes on our local MUPs lately. Usually young teens. But so far the close encounters I have had are all road bikes. The kind where weight is so important, they leave off the bell, and don't even bother to say "on your left" because it might cause them to slow down a little to breathe, and yielding is unacceptable for the same reason.
Most of the cyclists and other path users I run across are just cruising on a nice afternoon.