A basic script for comparing the contents of /r/all and /r/popular (released on Feb 15 2017)
This project was whipped together in a couple of hours to help determine what subreddits, among other data points (like domain, author, etc.) are filtered from /r/all and don't appear on /r/popular.
Much of this project doesn't follow exact best practices (i.e. separate config files) because it is designed to run locally only once. A future build may be created that is more flexible and can be configured.