Obsidian’s latest update, 1.1.8, introduces canvas, a type of infinite note that encourages visual note-taking. Although it’s only currently available on desktop, it brings much of the functionality of OneNote. Once on mobile/tablet, all that’s needed is a stylus/handwriting  plug-in (which, undoubtedly a developer in the Obsidian community will be working on). Fantastic step forward for the app.