You're kind of quoting him out of context > I believed, and still do believe, that statically typed languages are exactly what you want in the guts of your bus

You're kind of quoting him out of context > I believed, and still do believe, that statically typed languages are exactly what you want in the guts of your business logic. He wasn't making a case against javascript for his shopping cart but rather against dynamic languages. Now, you could certainly disagree with that as well, but it opens the discussion to a more correct one vs why you believe javascript is a mature language. Something the author actually agrees with.