Extra sensors also generate a lot of extra complexity in fusing all the sensors into a common consistent view of the world. And if your goal is just 'more data'

Extra sensors also generate a lot of extra complexity in fusing all the sensors into a common consistent view of the world. And if your goal is just 'more data' then you might as well just add more cameras, that's also 'more data'. I guess what you wanted to say way 'diverse data'. As with everything else there are benefits and costs to those approaches.