Irrelevant in a factory, where you can adapt things as much as you like - but crucial if you envisage people sending robots to environments they don't own - like a robot carer helping Grandma go to the store.
Needless to say, the profitable applications for this aren't especially short-term, so the ROI for this research is hard to predict.
If you prefer, you can substitute "Like a robot delivery driver, who must deliver to flats without lifts" or "Like a robot cop, chasing truant teens through a mall" [1]
They cost about $7/hr each to employ (~$62k annually since they're 24.7): https://www.digitaltrends.com/cool-tech/knightscope-robots-i...
A robotics mentor once told me "just use bigger wheels" for rough terrain rather than legs and fancy control algorithms. But stairs are particularly difficult for wheels. House bots will almost certainly need legs to maximize utility. Unless they are so cheap you can get one for every surface.
Tell that to these guys: https://www.youtube.com/watch?v=v1apqfrJYwk. I think one day we have have two wheeled robots with these kind of capability.
That's one, and also a much smaller footprint than a wheeled vehicle.
> This how modern salad farming happens for instance.
And mushrooms too.
Mushrooms too.