Aside from perhaps higher capacity, what is the point of these when there are already components in the game with the same functions. Part of the point/challenge of games like these is to come up with a logical or efficient design.
The biggest problem people have is they try to build everything too tight together, end up having no room to link up required components when they open up a new tech tier, and then they get pissed that they have to tear it all down to re-place it with more space or with the ability to send material where they need/want it to go. S P A C E things out. That's the key, not duplicating components that already exist.
This is just me, but I enjoy trying to build efficient, stacked storage, and once you get a decent design, storage is essentially infinite, providing you give yourself ENOUGH S P A C E. :)