Microsoft knows that reliable software is not cost effective. According to studies, 90% to 95% of all bugs are harmless. They're never discovered by users, and they don't affect performance. It's much cheaper to release buggy software and fix the 5% to 10% of bugs people find and complain about.
Bruce SchneierSurveillance of power is one of the most important ways to ensure that power does not abuse its status. But, of course, power does not like to be watched.
Bruce Schneier