Sources: QNAP , 
quote: Many are commercial, turnkey offshoots from opensolaris like Nextera. Freenas is free, would be less supported. I use full blown solaris myself - you can get vastly superior support if you're willing to pay for it. But moreover, you get far more options. When you say "user friendly admin," I read it as "feature light."My NAS units run multiple instances of solaris, rhel, and ubunutu, yet still deliver at gigabit capacity. But with all the features of zfs. And if I want a new server function, it's easy to compile or install - anything that runs on X86 is possible.
quote: The point was that his argument isn't helping his position. His post reads like a total geek out, exactly the type of thing those buying pre-built NASes like the QNAPs and Synologys are often completely uninterested in. Seriously, compiling your own NAS OS add-ons are a plus for end users at home? That's just a bizarre argument.