While the smartphone maker argues that the phone does offer an expansion option in the form of a microSD card slot (up to 64GB, no less), some apps still seem to prefer to reside on built-in storage over anything removable -- Amazon's Cloud Player comes to mind.
So if an organization decided to buy even more disk space to try and increase their performance, they actually end up over-purchasing and under-utilizing all of their storage capacity for miniscule gains.