I read a story about Dreame. The founder worked in aerospace, but wanted to make a mass-produced motor with aerospace standards. So he modelled air flow using aerospace tools, built the motor to tight tolerances. Conventional vacuum motors run at 30k rpm, his runs at 100k rpm. Then he standardises on a single motor, for all his devices, robovacs, stick vacs etc, so he gets scale.
Dont be. Source: tried roborock and dream. They are both useless because you spend so much time troubleshooting it dealing with stuck issues you may as well get the cheap vac out.
Datapoint: I've used my Roborock s7 max ultra in three different households (2 houses, 1 apartment) and have had zero issues with this.
It actually was night and day compared to the $1000 equivalent roomba I had at the time. lidar is the game changer in this space, and roomba was complacent with their technology.
I've had a few issues, but they're far from useless. The issues are, e.g. a sofa has tapered legs so the end part is very low to the floor and basically invisible so the vacuum gets stuck there. I've placed a rag that stays there above the leg and nobody sees it or cares except the robot.
