The initramsf case and the embedded system case are good point.

Can Computer Science help us decide if some people are right?

The measure of Informational entropy : a state with more compartment as more order, thus more information. By merging /usr you lose information, thus making the one in need losing it, whereas the one without a need for this gain nothing.

I laughed at the comment of philosophy by pitchforks of angry users, and I would claim these pitchforks are the one from the Maxwell Daemons telling us to remember that it is easy to lose information and that increasing entropy is messy.