Ok, I'm ready to upgrade (from X1 mk2 and Z1) if you promise this one's in the works:
Pretty please, make a USB-C cable for the X1 mk3 to power the hub via laptop.
If the hardware doesn't allow routing this power internally, just make it a split one with USB-B and DC plugs on the other end.
I'm itching for the X1 mk3 and Z1 mk2, but completely unitched with adding another PSU to the setup. One more cable on the table, one more thing to forget or to malfunction, finding an extra outlet etc etc. What a drag for mobility.
Thanks for reading, please let us know you're working on it :)