Can robot vacuums replace a regular vacuum?

For daily maintenance, yes. Robot vacuums keep floors free of dust, crumbs, and pet hair between deep cleans. But they cannot match a quality upright for deep carpet cleaning, and they struggle with stairs, tight corners, and under couch dust that has compacted. Think of a robot as the thing that handles the daily routine so you only need to pull out the full size vacuum every week or two.