iRobot Quit Trying
The company quit trying while Chinese competitors kept adding features. I wouldn't say Roborock's app is great but the vacuum actually does what it's supposed to - clean without fuss. iRobot had two major problems - the reliance on vision instead of just using lidar and buggy software on the robot itself. At least every week would require a mapping run on the roomba while the roborock has operated nearly flawlessly for over a year.