I don't want to rehash that whole thing, but I totally agree with Gruber in that case.

The "Standard Markdown" name really implied a degree of canonicity and authority over Markdown, even though it was neither created by or endorsed by Markdown's creator.

CommonMark also only changed the name from "Standard Flavored Markdown" to "Standard Markdown" after sending a copy to Gruber, so I'm sure it at least felt very dishonest.

The new name is clearer, and it's been a settled issue for the last 6 years. I'm not sure why the article would have gone into more detail about it.