Umm Hello..
I was stating purely based on my experience. You want inconsistency in Windows 7?
Sure, me and my colleagues stuck at "Windows is updating..bla bla" for 24 hours without any real progress due to updating our Windows 7 via wireless. Now I am no packet guru but we expect that the update went corrupted due to unstable wireless connection.
Not to mention most of the updates require restart. Do you have experience using Linux as development environment? Only major update or update that involves kernel patching require restart. The rest is just simple, work out of the box.
Linux is no God, it shares its own weaknesses but again, as a development environment it performs well. Of course you have to be picky in selecting your hardware for Linux/Unix but the point is, if and only if Windows can achieve the same robustness as Linux, then I would come back for it.
