https://techcrunch.com/2021/09/08/the-newest-roomba-gets-smarter-as-it-vacuums/

The Roomba is easily among the most ubiquitous robots in the world — but it has never been one of the smartest. On the whole, that’s not a major issue. The top-selling vacuum is good at what it does: cleaning floors. But a roboticist’s work is never done; iRobot has turned the vast majority of its attention and resources on the line for good reason, and the company has spent virtually every generation improving the robot’s ability to perform its very specific task.

This time out, that means using on-board sensors to remember areas of the home and layout, along with areas that need a little extra cleaning time.