Not without seriously increasing the costs for car rental.

The cost savings for car rental are predicated on increased utilization. Increased utilization is predicated on each car having more people using it on any given day. And these things don't scale infinitely -- each car can only serve a particular locality.

The number of variations that you propose is a fast geometric progression. Kids 0-12 months or so need different car seats from kids 12mo to about 3y need different car seats for older kids. The idea that you could support high utilization on "I want a car that has already installed a carseat for a 1-2year old + a carseat for a 5 year old plus a bike rack" is nuts.

(Regardless, also, parents carry a mountain of stuff that's THEIRS. The heck with a car seat, I need board books, toys, snacks, and wipes in the car.)

> The number of variations that you propose is a fast geometric progression.

Only if you're an engineer. To a marketing person, you bundle groups of features together and price them at various tiers.

Er, I wasn't talking about pricing complexity, I was talking about the ability to actually get the vehicle that meets your needs. It doesn't do you any good to know that "a vehicle with three or more constraints costs $1.50/mile" if you get a vehicle whose three constraints are "4WD, Bike rack, Dog area" when what you wanted was "carseat1, carseat2, large storage area."

And if the fleet can successfully meet arbitrary needs around constraints, then the fleet is going to be heavily overprovisioned, and thus expensive.

But the fleet is heavily overprovisioned now. We're just used to absorbing the costs of the overprovisioning. But the vast majority of Uber rides (or of passenger vehicle travel generally, really) don't require five seats, don't require trunk space, etc. We just equip cars standard with these configurations for the small fraction of trips that actually require them. In some sense self-driving cars should actually reduce overprovisioning by letting single-occupant trips use smaller vehicles (and hey, in a pinch, cars with bike racks on them work just as well carrying people without bikes, just like five-person cars can carry a single person alright).

Car rental companies already manage this quite handily. Roughly speaking: economy, midsize, full size, SUV, 4WD SUV.

"4WD, Bike rack, Dog area" -> 4WD SUV.

You'll probably have to snap on your own accessories (kayak/ski/bike rack) when the vehicle arrives. Or if you order in advance, you can pay extra to have a specific accessory configuration prepared and set up for you (vehicle drives itself to local servicing point to get configured).

Once you are at your activity point it goes to grab your hot meal and meets you at the other side of your hike.

I would like that.

Perhaps a fleet of self-driving cars could reconfigure on-demand.

e.g. Customer orders a self-driving car with 1 infant car seat. A robot bolts-in a modular infant car seat at the depot and sends it off.

I've wondered whether some of this would lead to a personal "pod" like thing. I am happy buying a box with comfy seats and a TV and kids seats, etc.

But I don't need or want to buy a wheel, batteries, cameras, lasers, etc. Those also should be upgraded as technology gets better but my box doesn't really need to be anything but a box.

So what if I could sit in my box and have a transporter thing come over and clip onto me and take me away? You could have child seats and I could have a lazyboy chair, or I might need 8 seats and you need storage space.

This would then let the actual transporters take other types of cargo too, rather than having a people vs items split. It would allow a pony-express style swapover rather than needing huge range in a single one. It would even allow completely different types of transport, what if my pod could just be clipped onto a big train and whip me to the other side of europe?

This would all likely have other downsides, but is a fun thing to think about.

TL;DR shipping containers

How about making your existing car self driving? Your stuff is always there in the trunk, but when you're not using it, it joins the fleet and earns you some money.

I really want to see a day, where I drive my car to work. It then drives other people around and picks me when I am finished.

Retrofitting self driving system -- Nice idea!!!

The initial idea of Cruise

Convertible car seats can handle kids from 5 pounds to 65 pounds (like the Britax Marathon). That handles from newborn to 5+ years old.

You don't need drastically different car seat.