Fantastic! Works out of the box, should be in the WordPress-core

I was trying to find WordPress-Themes that load posts via AJAX and then stumpled upon this diamond here:

1.) Works out of the box with the default theme
2.) Does the job in a beautiful way
3.) Changes the URL perfectly with each AJAX-call (!)
4.) Keeps the site optimized for SEO as posts can be loaded in the server-rendered way too
5.) Keeps each post accessable like before
6.) Works even with special pages, search results etc.

You Sir, will get a massive donation from me.