I think it must be playing off the complaints about the Brotli compression algorithm using "bro" as a file extension. "Bro" and in this case "son" implying som

I think it must be playing off the complaints about the Brotli compression algorithm using "bro" as a file extension. "Bro" and in this case "son" implying some sort of patriarchal dominance over computing. In short: a joke.