I enjoy the format of this post. Work from ground up to something interesting. Not tons of dependencies and framework here framework there blablabla hype.
To follow along it seems you can just copy paste the given snippets and understand step by step how it works. If I wrote something like this, I guess I would use literate programming in org-mode and export to HTML, to make it a blog post.
I still question fonts with built-in syntax highlighting.