Kinda a weird article to be honest. It seems less like the author is annoyed at having to learn new languages or that their language specific knowledge because less useful as time goes on, and more that they are frustrated their code doesnt live on forever. I guess I don't particularly care if my code lives on or not. I build something. It's hopefully useful for others or myself for some period of time, then its gone…
If you want to build something permanent and long-lasting, go build bridges. It does seem kind of silly to expect software to be around for a long time.