That all depends on the consumer. I owned a Roomba and set it to run while I was at work. I would never see it operate. I just emptied it every day. However

That all depends on the consumer. I owned a Roomba and set it to run while I was at work. I would never see it operate. I just emptied it every day. However the chaotic way in which it patrols does mean it cannot replace a conventional vacuum for the roles of spot cleaning or for a touch-up just before guests arrive. It completely falls down in that role. Even using its spot cleaning mode it would miss a fair amount of obvious debris even if it was placed right on the most concentrated areas. And for touch-up before a guest arrives? You better have a conventional vacuum. Sometimes it would be unable to exit rooms even with the guidance beacons. I would circle around and never be able to get out of a conventional doorway. I'd find it dead in one of the two rooms I wanted it to do for the day, and found evidence that it didn't tackle a room at all. About once a week. And this was a 5th generation model. To me, the Roomba was to complement your existing upright or canister vacuum and was incapable of replacing it entirely. There would be greater success for a product that could replace a conventional vacuum entirely.