That’s… not many at all, really. You could do it in a year with ninety deliveries per day per location (well, 92).

Assuming a dozen robots per location, that's less than eight deliveries per day per robot (and even that might be beyond their upper bound, actually, given their speed and range).

But then they didn't do it all in one year. So… it doesn't feel like a stretch.

Given how many will be recurring customers with recurring journey routes, it feels barely enough to encounter all the possible unique problems.

Starship is just one company. There are dozens in the west. In China there are hundreds of sidewalk delivery robot start-ups.

We're not talking about all the "Possible unique problems", we're just talking about the really obvious ones that are easy to think up .