I think something small like Rock Miner did was pretty cool (the 100GH unit). Maybe make a pod like Bitmain...something that does not require a computer PSU to run.
To not require an external PSU means they have to put in an internal PSU.
Which means additional certifications are needed, and can sometimes delay customs/shipment...
(that being said, I agree it's nice to have)
I think what he's saying is, not necessarily an internal PSU but also not a separate external high-current PSU. Probably still an external supply, but something more like a brick. A 200GH VRM-less system would pull about 70% load on a 12V 5A brick and could probably run pretty quiet if built right.