Google via the OSSF introduced a Python API to compute Criticality Score of open-source projects. While there will continue to debate about how exactly to clip and weight parameters, being able to reduce metrics to a single number gives the community a quick first pass to judge which projects need help. Like h-index for academic bibliographies, Criticality tells only part of the picture. What about the score of fundamental libraries that have a large number of unhandled pull requests and infrequent updates.