It's almost something I would use everyday, but I don't think bookmarks are the right approach. For example, because reddit comments tend to be higher quality than YouTube comments I use AlienTube for YouTube which replaces a YouTube video's comments with reddit threads (if they exist). I'd want a similar thing for just any article, without having to bookmark what I'm reading (or go to a separate site even).
AlienTube chrome extension: https://chrome.google.com/webstore/detail/alientube-for-yout...