Thanks for sharing your knowledge and please ignore some of the other comments. HN is a place for "intellectual curiosity", but for some reason it always attracts its fair share of anti-intellectualism. Debating what cognitive load actually is is very relevant to the topic at hand.

FWIW, I can't speak to the science of it but as a programmer I even disagree with many of the conclusions in the article, such as that advanced language features are bad because they increase mental load.