I get the impression that the article's author didn't really read the linked help page. It's basic auth that's getting deprecated, due to being considered a legacy authentication protocol. For good reasons, as described. That aside, POP should really be considered legacy, it comes with many downsides that hinder people's e-mail usage. IMAP is definitely more functional, but has a successor - JMAP. So in some sense, i…
Problem is, it is being replaced by solution that decreases security.