Not quite Inbox bundles, but maybe getting a little closer
Gmail is one of the longest lived projects to come out of Google after the success of Search. During its life, the development team has been working on countless projects to make sense of the deluge of incoming email and help users manage it. We've seen everything from smart spam filtering, intelligent interpretations of importance and priority, grouping and categorizing based on sources, and with Inbox, even things like smart bundling.
This is a companion discussion topic for the original entry at https://www.androidpolice.com/2020/02/14/gmail-labels-travel-purchases-apk-teardown/