In T410069, we discovered that we could potentially offer people tapping any Edit button on mobile the ability to edit the entirety of the article's content while also increasing loading speed by decoupling the rendering of the section related to the Edit button someone tapped from the rendering of the rest of the article's content.
In this ticket, we'd like to build a proof of concept that would enable us to try out this "lazy load" experience for the purpose of comparing it to the user experience we are prototyping in T409990.
WARNING: before prioritizing work on this task, Editing Engineering will need to decide whether the approach David Chan discovered in T410069 is reliable/scalable enough to depend on.