Digression or not, I appreciate the extra info and feedback! Definitely relevant to my interests.
I probably won't have a server anywhere close to yours, I can justify a lot of things (see: previous thread entries where I went somehow from APU2C4 to C2778), but that is a truly massive amount of storage. 12 spinning discs and 9 SSDs, wow! I'll have only 5 spinning discs and a boot SSD. I'm just going to go from 5x2TB to 5x4TB and pick up transcoding ability and general purpose server functionality in the process. I already have link aggregation, so I'll be keeping that, too.
Thanks for taking the time to help educate me. I'll definitely be referring back to my notes from this thread when it is time to build my new NAS.