I find e-bikes interesting, and yet they don't exactly make sense for me. There are a few categories of e-bike that I could consider.
An e-bike is not appropriate for me to use on trails. That's because I already exceed speed limits. I think 15 mph is a reasonable speed limit on multi-use trails with pedestrians.
When I thought about an e-bike for myself, I mainly thought about it for commuting. That said, I live pretty far away from the office for commuting to make sense. (Maybe I should move.) My route is about 20 miles. I've only done it once, about three years ago, and it took me 1½ hours.
I felt like an Allant+ would be a great e-bike, but it may have been discontinued.