The cost of public transit for me is mostly time: imo bus connections are terrible when you're doing it every day (or twice!). And I ride as often as possible.

The cost of public transit for me is mostly time: imo bus connections are terrible when you're doing it every day (or twice!). And I ride as often as possible. It also supposes your city has an efficient and reasonably cost effective public transit network. Which isn't always the case. Automated electric personal vehicles solve both these issues: it's as timely as you can get (unless dedicated rail is weighed in, but...), and it requires only a city electrical grid.