“Cognitive load refers to the amount of effort that is exerted or required while reasoning and thinking. Any mental process, from memory to perception to language, creates a cognitive load because it requires energy and effort. When cognitive load is high, thought processes are potentially interfered with. To the UX designer, a common goal when designing interfaces would be to keep users’ cognitive load to a minimum.”
(https://speakerdeck.com/fedepaol/reducing-cognitive-load-yet...)
In this context, "users" can be substituted with "other developers". Writing low-CL code is a constant balancing act and, like good UX design, when it works the nuances are invisible and therefore hard to learn from.
So I appreciate the OP for the article even if we can quibble about some of the points.