Upvote for the feature to attach a notebook rather than a singe note. As a heavy MS Teams and Evernote user, I find the feature of adding a single note to a teams channel basically useless. If the notebook feature existed I would be able to bring Evernote awesomeness to the team. Currently I only use Evernote personally for this reason, and that in evernote business, there is no notification system for when another user changes a note, so it's not functional as a tool for team collaboration. A good integration with MS Teams could provide some of that functionality.