[vonunov]

> I'm not dropping emdashes -- though you can always tell mine by their two-hyphen form lol

I think of this as a dash (abstract function of punctuation) but not an em dash (concrete typographical form). I see the double hyphen as one of the possible representations of the dash¹ -- and a perfectly well-established one, to be sure² -- along with the em dash and the en dash, either of which can also be used to do the same job, depending on where you are and who you're writing for (the US uses em dashes of varying format (spacing) for that, while much of the UK uses en dashes with spaces to represent the same punctuation abstract). Are you instead conceptualizing the double hyphen as a representation of the em dash glyph?

If that makes sense then I'll leave it at that, but if it doesn't quite, then I have a somewhat longer hair-split I can send if you care for it.

1. A pseudo-glyph, maybe

2. Still acknowledged by Garner's as recently as 2003