no it's always been semicolon, the "super-comma" comes from describing how to use it. "It's similar to a comma but like a super comma."

same character, used differently?

i call it a super comma when its separating a list with commas within the sets.

so if i am listing colors like green, blue, red; foods like apple, orange, strawberry; and seasons like winter, summer, fall.

it's one use case for an em-dash, because whatever you have inside it has commas in the phrase.

square and rectangle situation. a supercomma is a subset of semicolon.

> super-comma

I would have assumed it's a synonym for apostrophe. super-comma <-> upper-comma, with super meaning upper, like in superscript.