Every improvement you make to an API pays huge dividends

This just makes the world a better place:

• \(\alpha\,N_{users}\) more happines for all users;
• \(\beta\;N_{users}\) less questions about how the library works;
• \(\delta\;N_{users}\) less lines of documentation read;
• Chances are you will realize your abstractions are not all adequate. We realized this while refactoring the API of the looping primitives;