Well cost is the most important, in the end I paid more than 30USD/MLD (that is ca 40% of the MLD price) just to communicate with it and feed it power, this is including shipment and duties. I didn't mind, but that's horrendous. I don't need an industrial grade hub just so feed the babies. The spacing limits the expansion, I have 19 slots but can only use 11. Some people have 7 slots but can use only 4. That's a pain. On the eyeboot the 3 usb slots on the side are actually quite awkward when it comes to space preservation. Above 800Mhz you are likely looking at external cooling anyway. Fans are cheap.  I would think that a 5-port USB unit with 15A supply per unit. would get one quite far, and then one can dailsy-chain the USB ports to the PC. Some time ago, there was a guy who basically resoldered the psu to a low-end USB hub, connecting it to a heavy duty PSU. That is my liking. I don't need all the housing, I mean the MLD2s are plain PCB as well, so just do away with all housing (except for the PSU). Anyway, my thoughts. For me it doesn't change anything, I am not expanding MLD2s anymore anyway.