alt Hacker NewsPretty much every single option there involved letting a 3rd party collect and own the comments.
If you're fine for 3rd parties to own all your comments and content, why even take on the extra effort of hosting or managing or building your own website? That's basically what social media is for.
What do you mean? The list has more open source options than not. You can self-host those.
It’s going to be easier to self-host a drop-in comment system than an entire dynamic site plus/including comment system.