trpguyy said: "While the term “existed” beforehand, it became a “thing” relatively overnight because of a 30 Rock episode that aired less than 10 years ago. I know that doesn’t fit your idea of a long-honored tradition that gains traction and with it, rules, but whatever."
The EGOT has been around since the 1980s and has been known to be used by performers, their fans, and showbiz in general. And I'd argue that the same audience that care about things such as the EGOT were the same fandom as 30 Rock, so there wasn't that much new awareness. It's always been a thing.
"Hey little girls, look at all the men in shiny shirts and no wives!" - Jackie Hoffman, Xanadu, 19 Feb 2008