Dell has no answer to all-flash startups?
How incorrect you can be.
Dell's on its second generation of all-flash Equallogic arrays, with the PS6010S, the PS6110S and also hybrid arrays for combined flash-15K auto-tiered storage. Additionally the richness and stability of the management and integration software is far beyond what is offered by the Whiptails, Nimbles, etc of this world.
I work for Dell, so AC