Consider the letters section of Phyicical Review, that turned into a weekly journal Physical Review Letters back in the 50s. It was a blog or forum back when papers were distributed on paper.
Basically because of the slow pace of review and publication the letters column became a way to talk about recent results or problems, and then follow up letters (i.e. comments on the blog posts) became common. So the editors decided to hive it off and speed up its publication schedule.
Basically because of the slow pace of review and publication the letters column became a way to talk about recent results or problems, and then follow up letters (i.e. comments on the blog posts) became common. So the editors decided to hive it off and speed up its publication schedule.