There are only 4 years in the typical US undergraduate curriculum, half of which is spent in breadth not depth, but the amount of 'foundational knowledge' neede

There are only 4 years in the typical US undergraduate curriculum, half of which is spent in breadth not depth, but the amount of 'foundational knowledge' needed keeps growing. 'Concurrent programming' certainly wasn't part of my education in the long-ago time, and the other two were electives (one of which I took, the other of which I did not).