Intelligence, including application-specific Quality-of-Service controls, greatly impacts the efficacy data storage systems. But always remember that the best resource management is no substitute for adequate capacity.
The example shows how ample capacity is not enough to provide a stable data storage solution when there are no controls on badly-behaved software. It simply hogs the shared resource and disrupts all of the other software applications.
Data networks, like the Internet, are similar. Without any priorities or constraints, resource hogs can be very disruptive.