Do you have a source for that? I don't believe this is true. When creating a notebook, I can specify if I want a OneDrive-synched notebook or a local one (OneNote 2016). Such a limitation _might_ be part of the Store version of OneNote, but that's just a guess. Also a Reddit thread I found discussing this topic stated there's no such limitation in OneNote 2016.
Do you have a source for that? I don't believe this is true. When creating a notebook, I can specify if I want a OneDrive-synched notebook or a local one (OneNote 2016). Such a limitation _might_ be part of the Store version of OneNote, but that's just a guess. Also a Reddit thread I found discussing this topic stated there's no such limitation in OneNote 2016.