It's a bit disingenuous to say that Facebook uses Vue for Newsfeed. It's on a marketing site, not on a performance and business critical part of the site. These marketing sites are very often built by contractors, not FB engineers, and tend to be one off efforts. Not to knock Vue, but it weakens the message when deliberately misleading info like this is used
A comment on the linked article actually mentions that it was indeed contracted. Very disingenuous indeed by the article's writer.
It's a shame since it's otherwise a well written article