>We call these extensions "high availability" because this approach means that re-indexing a production system can happen much faster, reducing downtime for our users.

Agree with their use of the term or not, they give you their reasoning at the end of the article.

That's crazy misleading. This is just a post saying, "hey, this is a way to sync data faster." Awesome! Much kudos.

But stale data isn't "downtime." This is tech marketing at like, MongoDB level.

Except it's not marketing from the vendor in question. This is a page by the US government.

I think it's just an honest misunderstanding of what the term "high availability" means, in general tech usage.