I had a recent project where: - 0-80% was adding useful tests. - 80-98% was mostly useless. - 98-100% found some really interesting bugs and forced refactori

I had a recent project where: - 0-80% was adding useful tests. - 80-98% was mostly useless. - 98-100% found some really interesting bugs and forced refactoring that made testing easier, and was definitely worth it.