why there aren't autonomous bicycles or the autonomous things in that class? I remember those "cockroaches" on Castro in the mid-201x, saw recently another significantly larger "cockroach" around Palo Alto, yet they slow, and cumbersome in their presence on the sidewalk, and don't seem to be made for the road.

Looking at the bicyclists "texting while biking" i think the delivery wouldn't be the only market for an autonomous bicycles.

Sidenote: heard that Tesla added an "aggressive mode" to its FSD in which it would drive at higher speeds and would make more aggressive maneuvers. I suppose it isn't just Tesla as after more than decade of docile behavior of Waymo cars i've been recently aggressively cut by a Waymo, and few weeks before that a Waymo car asserted it's well out-of-normal left turn trajectory forcing us to give it way to avoid being barreled by it. Interesting whether such an aggressive autonomous driving would shorten the burrito delivery time.