> Many companies have tons of desginers who need to prove they are needed, so they force change for the sake of change - at the cost of users. That may be one

> Many companies have tons of desginers who need to prove they are needed, so they force change for the sake of change - at the cost of users. That may be one part. But another part is companies that need to demonstrate to their uses that a version change is a big change. Microsoft is (im)famous for this: as far as I can tell, there has been little need for the constant UI churn in windows aside from convincing users that a new version is big enough to warrant that appellation (as opposed to a service pack/patch).