US+Canada cities with trolleybuses:
- Vancouver
- Seattle
- San Francisco
- Dayton
- Philadelphia
- Boston
I like them a lot. Smoother, quieter, and the wires impart a sense of permanence that's sort of like rail. I see both the effects of trolleybuses and the wires themselves as positives, and wish more cities used them.
Sadly I don't think it's happening. Battery electric buses are now good enough for cities interested in electric buses to start buying; you don't have to anticipate improvements, they are already here. My own city has a growing fleet of them. Given that most city leaders view wires as a negative due to aesthetic opposition, the transit benefits of trolleybuses over battery buses aren't enough to outweigh the bad politics of building wires.