These are not great metrics. There are no great metrics. The official JSON implementation is a good example. It is a mature project. It's used everywhere. If y

These are not great metrics. There are no great metrics. The official JSON implementation is a good example. It is a mature project. It's used everywhere. If you leave an issue or submit a PR that fixes a typo, the maintainer will flat out delete your comment and tell you to buy his book to educate yourself. Maybe this behavior is good or maybe it's bad. But maintainers are human and metrics are not going to cleanly pick up how well a project is maintained.