That short/long toggle in the top-right seems to expand and collapse the article. It defaults to short. Reading this article in its short form I kept wondering if I was missing something relevant (cognitive load++), but with the long form on I kept wondering if some paragraphs were explicitly intended to be superfluous or tangential (cognitive load++) for the sake of that collapsing trick.

For an article on cognitive load, using a gimmick which increases it seems ironic.