The author's primary complaint seems to be that Medium does not update the pubdate when articles are updated, consequently Google and other search engines give the article diminishing relevance over time. This strikes me as more of a problem with search engines than with Medium.

In my experience, modern search engines give far too much relevance to date, especially for evergreen content. I am purveyor of evergreen articles, and it is sincerely quite obnoxious to put a lot of research and effort into an original article, only to have some flip shop do a lazy rewrite a few months later, citing my article as its primary source, yet ranking higher in search because it is newer. It's a perverse incentive that encourages low-effort regurgitators, and discourages original work. Grumble, grumble.