Cool. Language extensions are easier to write. Honestly, never had the guts to really learn camlp4 beyond an introductory tutorial, so I am happy to hear that this new approach is easier and also more practical.

There is a link from the article with a more complete example of how the extension points really work: http://whitequark.org/blog/2014/04/16/a-guide-to-extension-p...

OCaml is great because it is doing a lot of things right. Hope, this new feature will become more widely used than camlp4, and become a stable feature of the language.