**Story**
As a reader, I want the ability to get an overview of an article as soon as I land on the page, so I do not have to scroll very far to know what the article is about
**Acceptance Criteria**
This is now on beta, implemented in {T145216}. Move to stable on all projects.
[] Subtasks are all resolved
[] There is a decrease in the amount of unusual infoboxes being logged after we have deployed T163805
[] Enabled on stable and beta
**Ensure before signoff**
[] Announcement has been made to wikitech of the changes (Olga)
[] We will use the ReadingDepth schema to evaluate performance
**Additional notes**
The Mobileview api is not impacted because ->filterContent does not apply any of the optional transformations including the lead paragraph transformation.