BTW, for anyone who has children who are doing distance learning during COVID, the vast majority of school districts are using the Web, not native apps on desktop or iOS for the kids to do collaborative learning and submit work.
From what I've seen, they're basically creating APIs like this that set on top of GDrive, DropBox, and File Upload / Server-directed File-Save. So in essence, all this new API is mostly buying you is offline mode.