The Usenet post I linked to claims it’s originally from the 1st quarter of 1990, but who knows if that’s accurate or not. I actually can’t find a good source for whether Stumpf is the original author or just the one who posted it to rec.humor.funny.reruns, but it’s usually attributed to him at any rate.
But yeah, fairly ancient by internet standards. I remember first running into it in the 90’s