I like this post, but I gotta tell you, it just makes me want to dust off and write a bunch of s-expr tools to make that ecosystem equally or more attractive for DSLs.

If I do, the IRS will be the first to know about it! I'll staple an announcement to my 1040. ;-)

This is exactly the same sentiment I had reading the article. Seems like a good weekend project to write a schema validating LSP server for S-expressions (with autocomplete).