You certainly have not understood what the GP was talking about. It is about Concepts, Computation and Mental Models. The fact that you equate it with PLT just proves my point.

> CS is not complete without compilers, networks, DBs, OSes and computer architecture.

This is completely orthogonal to what the comment is talking about.

PS: Here is a good tutorial on Map/Filter/Reduce model of computation - https://web.mit.edu/6.005/www/fa15/classes/25-map-filter-red...