>It's MS's emulation of the superior *n?x/BSD security model, starting with Gates' famous trustworthy computing memo, and a significant contributor to the time gap between the introductions of XP and Vista.
>
>Security has never been more important and will only get ever more so. At one end you have Snowden, Wikileaks etc. On the other, web-connected devices (fridges, home lighting controllers etc.) which have zero or poor security. Search for "Metaploit" on YouTube. The list is endless ...

...interesting points