My main concern is the compatibility of out USB drivers especially if anyone wants to use modern equipment, motherboards, portable drives - HD and DVD, etc in view of the fact that almost all laptops available here only have USB3 ports.
It is highly unlikely that a USB 3 port will work, until we have a USB 3 driver. You may have options to make the USB system run in USB 2 mode, but even that may not work without a USB 3 driver. It all depends on how the feature is implemented.
I know that USB 3 is fairly high on the todo list at Arca Noae, but, AFAIK, even Lars hasn't tackled it, yet. This one probably needs to jump ahead of WiFi, as a must have. From what I have been reading, it is likely that SATA (AHCI) will eventually be replaced by USB, and that will probably happen sooner, than later, simply because USB is CHEAP.
As usual, be careful what you buy, if you want to use OS/2.