Yup. To add to that, posting a reply to your own blog and setting rel=“in-reply-to” and notifying the author with Webmention provides standard decentralized com

Yup. To add to that, posting a reply to your own blog and setting rel=“in-reply-to” and notifying the author with Webmention provides standard decentralized comments/notifications. See aaronparecki.com and the indieweb community for examples.