What single platform ? And hey, those EF array's DON'T run Data OnTap
Funny, but it seems to me the people making these comments haven't actually READ the article. The primary product being used here is the All-Flash EF series, the brute-force performance arrays NetApp acquired when it bought Ingenio. FAS arrays are being used for - wait for it - home directories, a great use for NAS but hardly revolutionary.
There's no "single" platform here, two completely different products running different OS's, with completely different management, being used for two different purposes.
All vendors give product away from time to time to "buy" market share. The customer usually ends up getting burned on maintenance, or upgrades, or something else, since the vendor has more experience writing contracts than the hapless customer overwhelmed by the "deal" they are getting - let's have a follow-up article in a year and see how happy they are with it (which isn't to say they won't be, just that would be a more interesting story).
I am trying to find an anti-NetApp slant to this article, but aside form El Reg's usually irreverent, tongue-in-cheek reporting style, I don't see it, what are you all complaining about ? If NetApp has been crowing about replacing DDN because of better performance, then kudos for him for sticking a pin in that bag of air. They gave some kit away, that's often how you win reference accounts or deals.