Im curious have you installed windows on it then? Or are you working on a none windows network? Or maybe i should ask what are you calling serious IT work? These are serious questions by the way im curious? Running windows in parallels for visual studio (C# development) and Excel vba and addon development. I have office for Mac installed too but its crap. SQL server also running on windows. I do a lot of python development, I use PyCharm IDE from JetBrains but I run that Mac. Also have mysql and mamp running on Mac. Macs instant boot time, compact size, SSD, i7 processor, long battery, with retina screen and backlit keyboard, make it a great portable development machine. They are sturdy, well built machines. Ive not found a windows laptop that feels as well built. I never network it to corporate networks, the places I work don't allow that.