What is the purpose of the rolling tenure? If the finite length is meant to serve as a stick, I would argue that it is useless. People who do good fundamental r

What is the purpose of the rolling tenure? If the finite length is meant to serve as a stick, I would argue that it is useless. People who do good fundamental research do it because there is nothing else that gives them the satisfaction. Yes there may be a few who defacto retire after hitting the assuared tenure, but if this rolling tenure becomes the norm that would add additional unnecessary risk to most. Fundamental research is risky, and we need people to go down the wrong and useless path to mark it such to keep others from going down that route. The finite length tenure is not conducive to the risk taking process.