It's a lot harder to make NT run stable that Linux, IMNSHO. There are too many little memory leaks in NT when you do anything, especially on the local filesystem. e.g. Try setting up NT to do big backup jobs, where terabytes of data pass through the local disk controllers. You'll see what I mean.
But yeah, as a router or something, or a foot rest, or doorstop, NT works acceptably well.