A simple measure of software dependency freshness. It is a single number telling you how up-to-date your dependencies are. Rails 5.0.0 (June 30, 2016) is roughly 1 libyear behind 5.1.2 (June 26, 2017). There are obviously more nuanced ways to calculate dependency freshness. The advantage of this approach is its simplicity. You will be able to explain this calculation to your colleagues in about 30s. If your system has two dependencies, the first one year old, the second three, then your system...