There are so many decisions you have to take day by day. Not always the decision you took yesterday is the best choice today. The world is changing very fast and criteria that have been right yesterday are now overruled and substituted by new facts.
This is also right with your decision about a new storage system. What was the best choice during your last purchase must no longer be the best one today. More and more traditional storage arrays are confronted by a competing architecture: one example could be software-defined storage (SDS). However it is up to you to make a new decision and decide which architecture fits best in your environment.
To help you make that decision, we request you to take a look at this paper and find out the pros and cons of traditional storage arrays versus SDS.