Kind of like how you can do [in-line links](a website) to link people to a website, allow the user to use the same syntax to create contextual information that appears when the user mouses over. This way users who know the context won’t have to slog through a massive wall of text while those who don’t can optionally bring themselves up to speed.
Sounds like something the collapsible spoiler can do.
The problem with that is that you can’t
have spoilers within the line itself
As each spoiler requires a line break
and it just looks awful, both in the markdown, and especially when rendered as a comment.
Compare the almost seamless implementation in my example to the raw output of this comment.
This is definitely a cool but very niche feature that I and nerds like me would use, but the vast majority of normal* folk never would. So for that reason it’s probably not going to be any kind of priority to add. But hey, in the meantime, we’ve always got footnotes!
* “normal” by Lemming standards, anyway
