These is a post on HN today about “Replacing Disqus with GitHub Comments”. I had Disqus, I forgot why it stopped working or maybe I just never enabled it in the first place. So I took this opportunity to add comment to this blog, using the method suggested in that post - Github Issues.
I also removed Swiftype search. It worked for a while then stopped, I did not try to find out why either. Now except for js CDN, this blog has no other outside dependencies than Github itself. This makes the maintainence much simpler.