What makes it non-trivial? I'd love to see a standard laptop frame that all the SBC manufacturers could throw their board in.
I imagine their could be vendor-specific expansion cards for SBC's, like one that is just an HDMI extension which only works with the vendors SBC and doesn't use USB-c. Maybe vendors could implement one "framework" compatible expansion port and provide several of their own expansion cards that only implement SBC features, and plug directly into the SBC instead of generic usb-c.
I imagine their could be vendor-specific expansion cards for SBC's, like one that is just an HDMI extension which only works with the vendors SBC and doesn't use USB-c. Maybe vendors could implement one "framework" compatible expansion port and provide several of their own expansion cards that only implement SBC features, and plug directly into the SBC instead of generic usb-c.