I've been salivating at the thought of something like this too, but the whole module system being built around USB4 would be kind of a problem.

Really I'm just waiting for host support to trickle out to chipsets other than those by the vendors who wrote the Thunderbolt spec it was built around.

But on a similar note, personally I'd be even more interested in a board that's just a USB4 hub instead of even having its own internals. Given the moddable-on-purpose nature of them, it would enable a whole new range of capabilities if they could also extend other devices, especially if (I hope when?) they branch out to other form factors.

P.S. I'm typing this comment on one right now -- Batch 5 ^.^