They were considerably more expensive the first year Tesla FSD was due to be ready by the end of the year. After that I guess it was deemed easier to do magic with some low quality cameras than get certain people to admit they're wrong and change course.
Current ones still 10-20k, some advances and mass production will lower that further. And there are very different LIDARs (frequency, resolution, range!!), the ones in Smartphones and other small devices work very different.. maybe as different as the ultrasonic sensors in your car vs medical ultrasonic (beware, bad comparison actually).
I'm guessing your vacuum isn't doing 140 miles an hour with four humans in it with an expectation of life-conseving flawless performance for the next 10-15 years. And definitely not in the rain, at night, on rough and uncertain road.
I live in an apartment so I've yet to really see the reach of this thing's lidar. It maps the room almost immediately though, then cleans by first lapping the perimeter of an area then does laps to cover the inside of the perimeter like someone mowing grass. The map is cached from the last full cleaning, so if I wanted it to do some spot cleaning I can define an arbitrary rectangle and specify how many passes I want over that spot (one is always enough, the second pass never picks up anything else). I can also control it manually but the controls have some latency from the app. I love this thing, it fills its chamber entirely with cat hair that I wouldn't even see until sending it out. It also tracks maintenance and tells me when sensors or the filter needs cleaning, or if parts like brushes need replacing (haven't needed one yet).
Mine most likely can’t see 300 meters, but it definitely knows where it is and plans it route, optimizing over time. It’s kinda neat to pick it up in the middle of vacuuming, move it to a different room, then set it back down and watch it go back to where it left off.
