At this point, I suspect most of us are aware that Microsoft is deprecating the win32 desktop version of OneNote, and will not be upgrading OneNote 2016 any further.
Instead, Microsoft will be pushing the UWP OneNote app and will offer legacy users the option to upgrade to the newer version of the app.
For power users of the OneNote app, this has been a worrying development as the UWP OneNote app lacks many features the older app has, including basic things such as the ability to Send to OneNote from Outlook for example.
The good news is that Microsoft is committed to feature parity, and has been working at adding back such features, including adding the option of Sending to the Modern OneNote app.