So much to appreciate here. A few things that really stand out for me:

- RAM on one side of the mainboard, CPU and PCIe on the other. All upgradable. (never seen that on a desktop motherboard)

- The CPU appears to have standard heatsink mounting holes. Maybe you could put AIO water cooling in it if you wanted to?)

- PCIe power ports on the mainboard, even though they're not used by the MPX modules. Looks like 4x 8-pin and 1x 6-pin.

- unused SATA ports

- unused internal USB-A port (anyone know if it's USB3?)

- front fans use non-standard spring contact connector, so if they fail you're stuck getting that monster module from Apple, though that's probably not very likely.