The new designs are often a result of the fact that managers can get credit for overseeing something new that becomes successful, but not for maintaining someth

The new designs are often a result of the fact that managers can get credit for overseeing something new that becomes successful, but not for maintaining something old. So companies continually churn out useless new versions of things because of bad incentives. I've heard that Google is particularly prone to this, but I can't find the references for it. This sort of thing also leads to TV shows with short lifespans. (If it's a product that can be developed by one person, programmers may be involved instead of managers, but not much is like this any more.)