Roborock, Dreame & eufy

Camera-only robot vacuums get lost in dark rooms and take hours to learn a floorplan. LiDAR Robot Vacuums that work with Alexa use a spinning 360-degree laser turret (or solid-state dToF laser) to map your entire house in 8 minutes flat, clean in pitch-black darkness, and obey room-by-room Amazon Alexa commands.