Comment by g947o

Why would GitHub do that just because one project thinks is a good idea, especially when there is absolutely no concrete evidence that this is any more effective or efficient than using issues? All that we have is project maintainers' own beliefs. Bear in mind that these things can be studied and measured quantitatively.

The current "issues" system works fine for most small-medium projects and even many large projects. Any project who looks for a more "serious" solution would have its own Jira/bug tracker system, and you can find plenty of them.