> A bus can take 50 people into the city at once.
And a bus will waste the time of 49 people while stopping to load/unload just one person. Mild carpooling (think: a van for 3-5 people) can work.
Longer term, work from home for most jobs will eliminate the need for high-capacity transit. Outside of special use-cases like sports areans.
Yes shared trips of course waste time. For 50 people you dont want 50 stops. But 1 or 2 stops pickups on the way is fine. The algorithm across all this can optimize cost and travel time for each rider. There may be transfers for cheaper prices.
E.g. $5 for a 30 min trip and a change or $20 for a 15 min trip direct taxi experience.
If the road is a bottleneck optimising for usage it may let buses have a fast lane and the difference is less.