You monitored those ports for drops, buffer errors, and discards? You alerted when they occurred? Most don't watch the right counters or log messages. Even then, I guess you can get away with it if your customers aren't savvy enough to complain. Detecting microbursts in a VM would be impossible. Ignorance is indeed bliss.

One of my first bosses thought his Dell switches were awesome until I showed him all of the drops.

Also, roaming profiles were a great idea in principle and a horrible idea in practice. There's a good reason those things went away circa Windows 2000. ;)