I developed a new comment system and it is now active on my blog(s).
You can check out the source code of it here on Github or here on my website.
Basically, authentication is handled by Github, and the comments are stored on a self-hosted backend. If you don't have a Github account and want to comment, you'll have to make an account. There are no permissions required as the system only accesses public information. Github is just used as the authentication side of the comment system.
Why not give it a try and comment here? You can edit the comment afterwards or even delete it if you want.