> if it was simple for a user to augment their email app You don't really think it's ever "simple" for a user to augment their email app? Plugins are hard to

> if it was simple for a user to augment their email app You don't really think it's ever "simple" for a user to augment their email app? Plugins are hard to implement on both ends, and they complicate otherwise simple apps. Open source is also hard, because every codebase is different in many and often unpredictable ways from others. Not even an experienced programmer would always be able to crack open the source to a mobile email client and make this sort of modification.