Sure, but someone still has to test each update as it applies to each critical system or widely used standard PC configuration before giving the OK to roll it out across the organisation. If MS moved to releasing non-essential updates in an ad-hoc fashion, it seems inevitable that the result would be either a scheduling and resource management headache for corporate IT departments or (perhaps more likely) a general policy of not deploying non-essential updates at all by default in large organisations because the hassle of keeping up isn't justified. Corporate IT have enough to worry about already without someone potentially moving the goalposts on a daily basis.