Re "the 2-5 person capacity mass transit vehicle": Lots of cities have enough density to support good dense tram / train / bus networks in the centre, during t

Re "the 2-5 person capacity mass transit vehicle": Lots of cities have enough density to support good dense tram / train / bus networks in the centre, during the day. But quite a lot of the people who would use that, also have to go further out sometimes, or need to get home later at night sometimes. If mass transit can't do this too, then they need to make a whole different plan... often meaning a car, and a house further out to afford parking. This seems like the opening for smaller vehicles. They can perhaps fill in the gaps between lines, and the long waits between night busses, in a way that couldn't be done before, essentially because human taxi drivers are too expensive. It's possible this could help make proper public transport viable in lots more places than it is now.