I agree, say now you may have two CARS each costing $400/month ( AAA estimate ) Total cost of ownership ( Insurance, gasoline, Repairs, depreciation ).

Now when some thing is available for $200/month , you won ONE CAR like OLD way ( for Kids etc.. ), and your spouse may use FLEET CAR .

don't forget the bulky and heavy car seat(s)

When I lived in the Metro DC area (Bailey's Crossroads in NoVA) with a 1-2 year old we kept that stuff in the bottom of our stroller (mostly in a single medium-sized bag). We took the stroller everywhere via buses and trains. We very rarely drove our vehicle while living in DC since a couple grocery stores, several restaurants, and several department stores were within easy walking distance (about a mile) from our house. With the stroller, we used carabiners to hold bags on the walk back. For longer excursions (all day to a museum or zoo), I'd bring a backpack with misc stuff in addition to what was in the stroller. Our stroller had a detachable car seat integrated (the car seat set locked into the stroller when using it as a stroller), which allowed us to use taxis if needed.

... and someone else mentioned the car seat, too. Always fun!

However: unless you are planning a very large family, this is a transitory phase. I noted as my kids matured the amount of crap you have to lug around drops precipitously. I can't see that many people needing to carry the stuff on the bulky end of this for years and years. I carried my kids sequentially in a back-pack (3 years separation, so #1 was walking everywhere when #2 came along) and managed to fit all the above (aside from movies) into the back pocket of the kid backpack (strongly recommended for the transition to walking, incidentally, as a backpack is almost zero hassle when empty, while a stroller is just as hard to push empty as full).

But back on topic: you could lease a car/van for the Peak Kid bit of your life and still save money.

For non-personally-owned self-driving cars to catch on, you'd probably have to see an expansion of convenient storage lockers near parking lots.

Easy, have a self driving cart to follow you wherever you go!

pfft, made up problems. You will submit to not owning anything. You don't need a house either, just go to an AirBnB every night.

Everything must be a service. Ideally provided by google.

Next thing your going to say is that waiting for 15 minutes in the rain with a crying baby while you get gouged for triple price because of nearby concert is a problem for you. Just suck it up and accept that car ownership is a outdated idea and you need to bow to the will of the tech hipsters and conglomerates.

It would be pretty easy for a fleet service to also provide a bin that you can persistently store your stuff in. When you summon a car, the system puts your bin in before it goes to get you.

I agree, there are good % of people like you for all right reasons to have a their OWN CAR "same CAR" every day.

There will be different flavors of pricing for needs like yours, like 'Keeping CAR With you'. How about this pricing

Option 1: The CAR will be in serving people 10 streets around your Home, will be available whenever you want but costs you $300 /month ( It will have two Locker boxes in the Truck to keep your Items ALL the time, and your LOCKER BOX opens only with your Smart Phone ).

Option 2: you lease Autonomous car, it is all yours to keep, but the price is like $500/month Lease .

But do you get rollover miles?

WHY must YOU keep CAPITALIZING RANDOM WORDS?