This is just a wild stab in the dark (I completely understand if this is out of your wheelhouse), but is there any chance you might be willing to produce the USB expansion board for sale on Tindie as well (as mentioned on the forums) for those who can’t solder a kit together themselves?
Yep, this is specifically what I was referring to. While the project shows promise, it sounds like a strictly DIY kind of kit, which would involve soldering and assembling yourself. While some people may have the requisite tools and skills with a soldering iron, I’m sure there are many who do not.
Since you seem to have some experience getting things to production (even if it is a small run), it would be pretty invaluable to the community if you were able to get something the average joe could purchase. Particularly, if your able to make small improvements (For example: spreading the USB ports a bit further out so even larger connectors can fit at the same time, or adding USB Type-A ports in addition to C, etc).
Edit: I did add myself to the email waiting list for your upico expansion board. Specifically because (if I am unable to find an alternative), it at least has 1 additional USB port. Plus I get to support a community project which might encourage developers to come up with more nice things to play with in the future.
Sorry for asking something probably obvious, but the uPico will be accessible through USB serial to talk to it in MicroPython REPL (interactive mode) yes?