synergy
Curious why HP didn't just go the synergy route with this solution. I mean plug a module or two in for nimble controllers, plug one of those storage modules in(apparently can do 40x2.5" drives which is plenty for all flash), a couple more servers for the hypervisor stuff, and integrated networking. No need for having to ship a rack, or much cabling, and plenty of capacity to scale out inside and/or outside the enclosure.
I suppose the main reason is it would probably cost a bit more, so perhaps offer it as a option (I suppose the obvious option would be a Nimble solution that runs inside a Synergy enclosure which really should be trivial I think Nimble uses just regular servers no special hardware architecture).