[dsr_]

The lesson of that is that you should wait at least 20 years before getting a device that purports to do the thing well, and maybe 40. And even then, people will still publish recipe books and cooking technique books.

Right now, people who have flat floors, not too much pile on rugs and carpets, no pets or pets that don't shed much, no stairs, and don't have much in the way of mess are quite happy with their robot vacuum cleaners. Mostly. But vacuuming is pretty much the least annoying and tedious part of cleaning your house, and modern bagless upright convertible cleaners are cheap and lightweight.

People with medium sized flat boring lawns seem happy with their robot lawnmowers.

But its faster to get a service with the big mowers to do it, and the job gets done better by the humans, especially if you need to consider edges or have bushes to trim or leaves to move.