I think this is well enough explained by how unfashionable GOFAI and Common Lisp both are. Fashion matters a lot more than I thought in my youth. Speculating:

I think this is well enough explained by how unfashionable GOFAI and Common Lisp both are. Fashion matters a lot more than I thought in my youth. Speculating: the sheer bulk of the book might also push people away. It's usually an anti-signal for riches within.