Undo Send was definitely a Gmail "labs" feature long before Inbox existed [1]. You're right about the other two though. Nudges are nice. Ridiculous, though, th

Undo Send was definitely a Gmail "labs" feature long before Inbox existed [1]. You're right about the other two though. Nudges are nice. Ridiculous, though, that a useless gimmick feature like smart reply made it in but not actually useful features, like travel bundles or even the "finance" category. [1]: https://mashable.com/2010/08/22/how-to-undo-send-in-gmail/ https://mashable.com/2010/08/22/how-to-undo-send-in-gmail/