Only widespread commercial application of cable robots I have seen is cameras in stadiums and concert venues.

I guess in most industrial use cases it makes more sense to have a robot stationary and move the parts around with conveyors. Doing it that way allows to pipeline and parallelize the manufacturing process. In contrast the large operating volume covered by cable robot needs to be served by single robot exclusively.

I've always thought they could be good in agriculture (can't pipeline the ground, after all). Dealing with wind would probably require a ~fully constrained 6 line system though.