Violin is the leader in AFA only because of old data
The problem with calling Violin the leader in the AFA market is the data that statement is based on is 2012 sales. Most of the competitors including Pure and Solidfire shipped under 10 units in 2012 and didn't start really selling their products until this year.
Now that there are products that deliver 90% the performance of a Violin AND have data services lie snapshots and replication from not only Pure but EMC, HP, HDS and Dell why would the vast majority of customers buy violins?