I'm a fan of pairing a torque sensor with a hub motor. It sort of enables the world's best-shifting derailleur gears because there is no stress on them, up or down.
IMO when mentioning an e-bike is suitable for errands or commuting, you need to adress the question of fenders and cargo. Even if you live in a desert, you might want to keep crap from being flung up from the road onto your non-sport-specific clothing.