> Any child old enough for a school bus is also old enough for a self-driving taxi (age 8 or less). So that's most school/sports/activity runs out of the picture. And if you live in a city, your kindergarten and primary schools is generally 10 minutes' walk away or less.

Thank God I won't ever become a teacher. I can already imagine kids saying "I forgot my homework in my taxi and couldn't call it back in time"...

How is that any different from "I forgot my homework on the bus, and it left immediately after it dropped me off."

Kids like going on trips (for example to the store, or the post office) with the parents, even when there is no reason for them to go. Multi-passenger trips will equally as common as single.