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The problems with legs are sufficient that having two robots would be better than having one with legs. Here's why:

- You can increase the payload a lot

- You can increase the torso weight which means you can use cheaper, heavier components

- It won't fall down and hurt someone if it malfunctions

- It will never be in a position where it might fall down the stairs (if it were, it could kill someone)

- It will use less power/have a longer battery life

To be fair, there are wheel arrangements which can negotiate stairs. Tank treads can probably do it too.

A carrier bot can be parked near the stairs to transport the bot to different floors

I am protected

Goons never die, they just go to HN and regroup

I'm glad someone caught this.

Two robots

This is how I used to solve the roomba-can’t-use-stairs problem.

I’ve now moved to a single floor. Problem solved!

Then they can't bring anything up or down the stairs.

Still, I expect it won't matter - by the time we have reasonably priced robots that can reliably do all housework, that's like 90% of jobs eliminated from society and probably society will collapse.

Maybe one can throw things to the other :).

My kitchen, office, living room, gaming computer, entryway, and bedroom are all separated by sets of stairs.

So that's six robots for me?