Absolutely, Bruno, you’re right! Notifications like these are to be used with extreme caution for the reasons you mentioned. A lot of human and machine error can sneak in there which is never a good thing. I think it’s interesting that Apple provided the NSNotificationCenter API. It’s powerful because it lets you circulate a string freely across your whole app, but at the same time unwieldy. Definitely fun to learn about though! Thanks for adding your thoughts.