Roborock Q5 vs Roomba i3: LiDAR mapping beats random-bounce navigation every time

The [Roborock Q](https://www.amazon.com/s?k=Roborock+Q&tag=wehavethat-20)5 maps your whole home on its first run and navigates without getting stuck, while the [Roomba i](https://www.amazon.com/s?k=Roomba+i&tag=wehavethat-20)3 uses random-bounce navigation and got lost twice under the dining table during testing. That’s the core difference — LiDAR-guided mapping versus aimless bumping around.