Project idea: expansion card hub

I don’t know much about hardware design so I could be off base, but I feel like a 4-8 port usb-c hub could be made that could have expansion slots to hold cards and make a configurable USB hub.

It’d also be a convenient holder for extra cards.

I couldn’t find any posts talking about such an idea, but I could just be bad at searching so let me know if it’s been done already

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