In Phoenix you can as long as you live in a 200 square mile area comprising big parts of the Phoenix metro. And not just to the airport -- you can take it dinner, to the golf course, etc. SF and LA "coming soon".
I, no joke, encounter 4-5 of those white Jaguar driverless Waymo vehicles that are covered in sensors and cameras every day. They're all over my neighborhood. I believe (but havent confirmed) that normal folks can use them in this area too.
I thought about this myself as I went through this exact course. For context I had been exposed to and even implemented some of the concepts (like db sharding) at work but much of it was still new to me.
An ideal interview should reflect the actual work you'll do during the job. And I think system design interviews accomplish that job pretty well (certainly much better than coding interviews). Will you ever have to design and build a system like you during the interview? Likely not - a startup, while does require building a lot things for scratch, rarely requires the scalability and intricacy outlined in these interviews. While large companies will have the components broken up by team, so you'll often be silo'd into just one part.
That said, knowing how your systems work at a high-level is much more useful than knowing something like shortest-path algorithms. Even if you are silo'd, understanding upstream/downstream interactions can be crucial.
The other one I know of is Wing partnering with Doordash in AUS: https://help.doordash.com/consumers/s/article/Drone-Delivery...