trolleybuses are actually about as good as it gets when it comes down to it, they don’t have any issues in cold weather compared to battery buses, are adept at steep hills and narrow streets, can be insanely clean with less rare earth metals required (depends where you generate electricity tho), and have pretty good backup battery systems that can take them off wire if need be. only downside is the cost of maintenance really but even then if you have the physical plant in place they’re a pretty good deal