All panels collect dust, but this setup is much more challenging to clean (and to generally service, i.e to replace a faulty panel)
Apparently they also have special shoes that maintenance people can wear that distribute the weight properly so they can walk on them if they have to.
It is much better from POV of the cleaning robot maneuvering requirements. It's also much better in terms of single robot can access the entire installation.
But it's worse in terms of how much distance the dust should be pushed before it's off panel (as I don't see any gaps there)