The context is that John, the father posting that tweet, is a well known hacker and lead programmer on Wolfenstein 3D, Doom & Quake. He is still lauded today for his legendary optimizations to 3D graphics & network programming techniques.
That is not really the focus of the context and it's barely necessary to explain who Carmack is around here geez. He's right that post is hardly notable despite being a Carmack tweet, ppl are silly
https://en.wikipedia.org/wiki/John_Carmack