I ride vintage road bikes normally . My wife has bad arthritis so she rides an electric assist Townie . You have to pedal , no throttle. I recently broke my hip and had to have surgery so I was off the bike for a while. When I wanted to get back to pedaling and see what my leg and hip could do , I raised the seat and rode around our industrial park on it just to get reacquainted with cycling. It was great . I then started making local deliveries to my customers. I can see the attraction for some folks who commute and those who just want a relaxing ride. I see so many of these and as long as people ride them safely , I don’t see a problem . I have a feeling they aren’t going to disappear any time soon.