TCO = Totally Contrived Opinion?
Say it ain't so Chris - the TCO argument in this article is totally contrived. So many errors, so little time:
1) Cost of 16 month cutover from 7-mode to C-mode system ($622,000). Really? 16 months for one storage system? In my experience 1 month would be more than enough time.
2) Cost of planning, upgrading skills, and testing ($275,000). Unique to C-mode? Nope - upgrading to any new storage platform, even ZFS, would incur this cost.
3) Additional cost benefit of C-Mode Migration: How about nondisruptive operation? Zero planned downtime? Seamless scale out and scale up? Access to a universal data fabric? Multi-cloud data mobility? Hmm, there must be some $$ value there too.
IMO you can take at least $1M from the Wikibon 6-year C-Mode costs and show a payback of 12-24 months. Anyone that wants to do a more realistic TCO analysis - ask your Rep or SE to run a TCO report @ www.netapprealize.com.