While the last post from his blog certainly had the air of elitism to it that made it a huge turn off, I actually really enjoyed this one and disagree that it's not substantive. I don't think he claims that it's harmful on the absolute, he's simply noting the scope of evolution in the Lisp family of languages and the trade offs designers made. Implementing a simple 200 line lisp interpreter is a fine evening or weekend project, but macro expansion time and bindings are something that actual Lisp developers actually think about. (Or at least I have, as I've been learning CL).

Shrug. That post contributed to me better understanding the idea of Lisp and for that I think it deserves my upvote.