Dgraph Labs uses it. I am a bit ambivalent about it. For example:
https://dgraph.io/blog/post/putting-it-all-together-part1/Here it says 7 comments. But you only get to see one. You have to click into the discourse post to get more. This is due to Discourse's threading model. 6 of the comments were replying to the one on the blog post itself.
