Oh no problem! I will politely contend on it being overly broad, partly because I don't want a mod to get the impression the entry lacks merit when it is what I believe should be near inarguably merited. Also, I just want to summarize the importance of the entry because I like the entry! So to anyone reading this, here's my reasoning as to the "When X / X When" entry's in my opinion, logical soundness in necessity and high merits as an entry.
The point of KnowYourMeme is document the Internet and its memes -failure on either front, in any capacity, should be rooted out in all forms. Thus, no matter what form of entry, even if it is very all-encompassing, or very narrow, should be documented if it is prominent in some capacity on the Internet or in relation to the Internet. If any mod or user disagrees with this paragraph, I strongly invite you to reply with your disagreement and reason(s) why.
The "When X / X When" is a very well-known meme everyone is familiar with on the Internet -this alone makes it worthy of documenting even in a crappy simple short few sentences way as a rough draft, which is very often the case on this site for important memes, at least for a couple weeks before properly being filled out. Though, I did not leave it in such a state and completed the entry 100% in a day -because I had free time and a meme researcher kind of wanted it.
"When X / X When" has its origin fully documented to the best extent possible with the information the Internet has. The about section's fully filled out to the standard degree. The spread is well-documented with each important entry in its history laid out chronologically via documented sub-memes/events; complete with working reformatted references, links and grammar where applicable. If anything, I might worry I documented it so thoroughly people might strain their hand scrolling through it all -not be condescending about it but I fear adding too much more than I already have due to potential clutter/readability issues that would likely cause.
While the entry covers a lot and does build greatly off of existing information, it is in my opinion fully fleshed out and unquestionably meritorious to have documented. Why would we EVER skip documenting an Internet meme? Why would we EVER skip documenting something prominent on the Internet? The form does not matter -if it is prominent on the Internet, we as wiki editors are supposed to document it, based on the site's mission and core values -if I misunderstand those I invite anyone to correct my understanding. I am new after all, it's always possible I am misinterpreting things.
For that matter, it was a bit absurd to not have a meme so cartoonishly common undocumented especially when a genuine researcher writing a Master's thesis even asked why the "me when" meme format was undocumented, inspiring me to document the "when x / x when" format properly. Images/videos would likely retread existing images/videos already documented on other related (though not yet listed as related) entries and those vids/imgs are the only thing I can think of remaining that could potentially be used to add anything further.
As for how mods use this entry, if they want to treat it as a meme, it stands on its own two feet. Likewise, if the site mods want to use the "When X / X When" entry as a main entry for sub-entries using the "when" meme, I recommend it be used that way except in cases where certain memes better work as sub-entries to other memes such as the Sus Jerma meme. As you said, some sub-entries work better under other main entries, and I encourage thoughtful and civil moderator discussion and debate on such matters.
Thanks for letting me piggy-back off your post to explain this. Couldn't think of a better opportunity to.