A curious thing that’s happened in some parts of mathematics is that formal peer review, needing coordination of journals, editors, and reviewers, can happen af

A curious thing that’s happened in some parts of mathematics is that formal peer review, needing coordination of journals, editors, and reviewers, can happen after many people have already read the paper (effectively informally peer reviewing it but with fewer comments), and even after people have cited the paper. This peer review then seems to not serve much purpose. An example is the recent first finite prime gap paper where the result was quickly strengthened several times by other authors long before the paper made it into any journal. Another example here: https://mobile.twitter.com/adrianprw/status/1156534906618597377 https://mobile.twitter.com/adrianprw/status/1156534906618597...