UpTop Kilo Crossbeams - Compatibility Concerns?

I'm in the market for a roof rack, and the UpTop Kilo is really checking the boxes I need (load capacity, size, profile, accessories, etc.). A notable difference between it and most other racks, though, is that it has c-channel crossbeams that use a through-bolt system instead of the oft-used double-X crossbeam with slide-in bolt system. You can see them in this screengrab from one of their marketing YouTube clips.



Any compatibility concerns with racks or accessories? It looks like there are plenty of bolt point options here so I can't come up with a scenario where something would be hard to mount, but maybe I'm missing something...