I ask because the only reason I'm even aware it's possible to include embedded sheet music in a question without just embedding an image is because I asked a question on meta about lilypond: there's nothing in the site tour, nothing in the help section, and no box when posting a question that even indicates it's possible to do this, and so I doubt I'm alone in being surprised to find out about it after having used the site for a while already!
A link to either an internal or external guide to the basic syntax of ABC wouldn't go amiss either, but in the first place some sort of visible notice to even suggest it's possible sounds like a good idea to me!
Perhaps there actually is one, and I've missed it, in which case I do apologise, but then on the other hand that's probably an indication that it's not visible enough.
In fact, right now I'm about to post a question with sheet music examples and it's actually been a bit tricky to even find out how to do it, I've had to flick through posts on meta to find one that has an example. I think we're presenting an unnecesessary barrier to entry here.