> scheduling is per workload This is really the key: a supercomputer has the (software) facilities that makes it possible to launch one coordinate job that ru

> scheduling is per workload This is really the key: a supercomputer has the (software) facilities that makes it possible to launch one coordinate job that runs across all nodes. A data centre is just a bunch of computers placed next to each other, with no affordances to coordinate things across them. At on point in time the hardware differences were much greater between the two, but the fundamental distinction where a supercomputer really is concerned with having the ability to be "one" computer remains.