Chain punching is about LINKING ( chain) and series of strikes into a "blitz" like fashioned, used to overwhelm the opponent.
It can be punches or any type of strike, high line, middle or low or a combination of them.
It is taught in its beginner form as chain punching because it builds the needed mindset for what it truly is.
Footwork is crucial.
Those that overvalue it are missing the picture, just like those that call it "inferior WC".
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !