There is a bunch of these tools (linkding, karakeep are just two I know), what makes linkwarden stand out?

I would not say they cloned the design. The first breakthrough for Roborock was the S5, which had LiDAR and a map. Both was not something iRobot had at the time. iRobot simply chose to not innovate in the areas people wanted first. People didn’t like the random cleaning that the roombas did for a long time compared to the structured of almost everybody else.