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
It's still a Facebook owned site, and a public facing one at that.
Even if they just bought if as is ready from some third party, it shows Vue is mature enough to be accepted for such a use.
Because it doesn't: "not candid or sincere, typically by pretending that one knows less about something than one really does."
There's nothing insincere about saying that newsfeed.fb.com uses vue because it does. It isn't pretending to know less, if it were false, it'd be pretending to know more.
Disingenuous doesn't mean "I don't like that this person said x", or "I like y, so I don't like that this person said a good thing, even if true, about x."
It's becoming a pet peeve.
It's a shame since it's otherwise a well written article
However the reality is so far from that, where a marketing site built by contractors under none of the strict constraints of the product it speaks about uses Vue, that it serves not as an endorsement but instead a needless point of contention in the post.