I currently use Notion for some light collaboration, and this certainly seems to be an interesting development that might pull me in a little deeper (though I’m still happy with Drafts for all of my personal note-taking needs…)
https://www.notion.so/What-s-New-157765353f2c4705bd45474e5ba8b46c (September 17th update, if you’re coming at this from the far future…)