He is a bit offensive towards traditional academia that favors BNF and parser generators. It's been a while since a read it but I remember e.g. a rhetoric question (not exactly cited but by meaning): "Has anyone learned a programming language by reading the BNF?"

The style is very good and fun to read for someone who also reads other more boring papers.

I cannot say what this person means, and I have never read this paper before, but just the fourth paragraph of the paper has piqued my interest and I will read it all.