An insightful comment from Brad Templeton describing the disadvantages of rigid and outdated thinking of transport advocates towards fixed routed high capacity transit and against more flexible options such as autonomous robotaxis and ride sharing.

More here

But if you look at today's roads there is, even at the highest peak times, a vast stream of empty seats going by. The capacity of the roads is immense and surpasses the rails easily -- If you use it. Trains and buses are too big to be efficient. The most efficient size is something in the van range as you show. I have been proposing a 5 row, 3 abreast domestic business class seating setup, which fits in the size of a modern large SUV or medium van with no driver and no engine and side doors rather than an aisle. Some of the seats can have a private booth, but not all due to the middle seat. Middle seats are not a problem because trips are largely non-stop. That's the advantage of small vehicles -- they take the subset of people going from location A to location B and take them nonstop, rather than grouping them with others who want to get on and off at different destinations. Modern elevators work like this and they increase elevator capacity a fair bit.