The original author of the blog post _did_ write some interesting software in Lisp, used it to write a book, and then he wrote his blog post. To me this is a g

The original author of the blog post _did_ write some interesting software in Lisp, used it to write a book, and then he wrote his blog post. To me this is a good example of something languages have to have to make progress: users and evangelists/educators, with a large overlap between the two.