"""it was a unix/linux system them, being as the only way to rebuild your server from base is in a Unix/lLinux enviroment."""
You'll find that people use 'build' when they install just about any operating system on any computer. I know I've seen it applied to Windows servers plenty of times in plenty of different organizations.
"""Pray tell me, how does xss/cryptoapi/ etc etc etc etc unfixed MS bugs/flaws play into the scenario of seriousness, when now you're talking about 8k+ bank accounts being compromised."""
What? Unfixed bugs are unfixed bugs. Plus nobody said a bug was even at fault here, for all we know the compromise started with a botnetted Windows workstation.
"""At least, when an MS server is compromised you don't have to rebuild from scratch, or compensate x thousand/million/billion customers."""
If you have a compromised system and you don't rebuild from bare metal, you're really risking not removing all sorts of malware. Also, plenty of MS servers have been breeched over the years, often with far more than 8400 customer logins revealed to intruders. And the use of a non-MS environment doesn't cause you to compensate billions of customers.
Also, what have you been smoking?