
It's hard to just throw out a SAN, server, Cisco router or switch, regardless of it's age. Knowing how expensive they were, sitting there in the rack quietly routing packets hither and yon, toiling for years only to be replaced by something that can run a cooler IOS load or hold faster, bigger drives.
Our hearts go out to those little workhorses. So, when finance finally gives the Ok to get new gear and the old stuff is off the books, of no use and is headed for the trash, they often take a detour to the trunk of the car. These old beasts of burden can enjoy their sunset days in the comfort of a small half-rack, also resurrected from the scrap heap.
What does a person need a 540GB NetApp for in their house, sucking down 1200 watts of power when a 1TB Western Digital external USB drive is now under $100? and doesn't need to be configured? It's so not about money, or usefulness, or even simplicity. For the same reason someone would buy a lift for their garage, install a 100" screen in the bedroom, or buy an old WW2 warbird, IT people build datacenters in their homes. Because it's fun, because it's cool, because it's challenging and that few other people could do it even if it occurred to them. Because, in a way it's wrong.
When gmail is more than enough for the vast majority of people, IT people will install Exchange (and even Spotlight on Exchange, which is so beyond overkill). When some home network storage is needed, why not take home that EMC cabinet sitting in the back of the warehouse? And who needs a Netgear router when a perfectly good PIX 515e is laying around waiting to go to the dump.
All sounds perfectly reasonable to me.