Emptying into the dock instead of having to empty the robot's dustbin weekly and almost everything involving mopping in combined units is within that time range. Lidar mapping was also pretty rare a decade ago, Neato was the first and it took a while before others did it too, then there was apps for controlling no-go zones using those maps instead of variations of virtual walls, if they had anything like that at all.

Roomba was living off of name recognition for most of that period and was far behind in adopting any of it.