Awesome news. The read only folder will be great. I currently make one using the permissions in a SharePoint. But it's too complex to explain that to my colleagues.
I'd also like the ability to easily send a document directly to my students OneDrives. Or Cloud Attachments in OneNote that will distribute differently so each student gets a unique document.
Read Only Folders are useful, but often the student then needs to save a copy to their Onedrive so they can then edit it privately. If I were to embed the document in OneNote and distribute it then it's a static attachment. There isn't the ability to do Cloud attachments in OneNote. But I'm not sure how they work if you distribute the pages to students. I think the Cloud location remains the same in for all of students. So whilst they can edit it, it's not their own work because it's shared with everyone.