Great, but I would've been happier if I'd had some dead simple dependency tracking 10 years ago. Just enough to create metabug functionality with. Like Bugzilla, Trac, Mantis etc have sported for at least two deades. I've always wondered why Github didn't have such basic functionality. (No, just the ability to reference other issues is not enough; I want to get an email for the metabug when all blocking issues are resolved).