Google Classroom has created a "Materials" section where teachers can add documents, like presentations, agendas, and other docs. In Canvas, teachers have a section called Files where teachers can also add these type of files, but it only works if the files are in the teachers' computer, or if the teacher has their google drive sync to their hard drive which uses a lot of space. Our teachers LOVE to upload useful files here for student's reference. Teachers know they can add files to assignments, but the Files section is a general place where they can just add materials.
If we have the option to click on "Drive" from an assignment and add files from our google drive to the assignment, why not having this option under the "Files" section? If the teacher is doing all his work in google drive, why having to download the files to their computer ? (which by the way converts the google docs to MS Word docs and Google sheets files to Excel files!)
We have implemented Google Drive Stream in our users now, which allows teachers to have their files back up on the cloud and available offline. However, google docs, sheets and presentations cannot be kept offline. therefore, we cannot upload them to the Files section at all.