If I understand correctly, the military doesn't really want to be cutting edge, as things go boom with yesterday's tech, without the trade-offs of untested, novel "innovations". I think there isn't much advantage in new developments, apart from convenience.

And for W2k, I wasn't merely suggesting it's well-tested, but also a different, better thing than say WindowsXP. At least, I got the impression operating systems folks reference it for a "many good ideas" kinda thing.

Sorry, I don't have any expertise in any of this and talk mostly out of my ass.