All-on-the-left layout is inefficient
All-on-the-left layout is inefficient - esp. when you have multiple sections and pages that you are jumping back and forth. All-on-the-left layout, compared to the 2016 layout, simply takes too much space if they are all being displayed. Having "Sections" on top helps a lot.
This is the most important reason I switch to OneNote 2016 from the OneNote app. Sad to see 2016 is being dumped.
We use OneNote2016 and will not switch until this usability is reverted back at least as an option. This takes up way too much room.
There are lots of people who think so too.