The summary endpoint is a great way to get metadata about a page that is useful to display to users to help them decide if they would like to read an article.
Page views have been a great addition to the APIs and are increasingly being added to designs for apps. Just like wikidata description and thumb, these are starting to become a basic piece of data that clients may want to display in many other contexts.
This leads to the question: Is it feasible to return Pageview data in the summary of articles?
How would this affect caching / cache invalidation / storage / CPU?