It's a bit sad to see that the book he's referring to at the end is a book released in 2003, to which this is the foreword.
Lisp is an incredible experience to write and experiment in, unlike any other language I've ever worked in.
Still, I believe there are many people out in the field that are mostly about "just delivering the spec" or about making money; pragmatists who care not too much about the art behind the software, and I suspect that will always remain the case.
Craftmanship marrying art and mastery is a niche, but that doesn't mean it's not thriving in spaces for enthusiasts.