It’s true. They “die”, then come back ironically, then come back nostalgically, then they stay forever.
They don’t die now though. They’re current, then cringe, then ironic, then nostalgic.
Right now I’m watching “cringe” as a meme start to become cringe. The self-referential stuff is always the most fun.
The thinking of this article is: “if adult use a kid’s phrase, that kills it”, although nowadays that’s not always true. In this case, “ok boomer” is used two different ways so it’ll still live.