what is in between a disc shaped robot vacuum and an android walking around with a broom? there's no obvious path between those two designs. the answer is all the growth iRoomba needed and another $10b.
the problem with disc shaped vacuums is adapting your whole home to make their labor saving make sense. not maps or china or all this other bs.
It's not exactly the missing link, but a lot of brands have started adding features that could be seen as in between, like a little robot arm to pick things up, and little "legs" to go up stairs.
https://www.cnet.com/home/kitchen-and-household/dreames-new-...