I'm curious, how does it compare to google's own similar product, Backup and Sync[0]?
It seems like the primary difference (other than being FUSE-based) is that, for data where google has a collaborative interface (docs, sheet, etc), Backup and Sync will place into the folder a "file" which is simply a link to open up the docs/sheets/slides app. Your app, on the other hand, seems to translate this data into open office format when changes are detected (i.e. .ofd for docs).
At first glance this strategy seems less good for real-time collaboration and less performant, but there may be advantages to it as well.
Do you find that strategy to be practical in most cases? Are there other features that distinguish this from Backup and Sync?
EDIT: Aha, looking into it more, it seems like mounting drive folder with this project doesn't trigger the downloading of any data, and rather lazily loads the data when the file system requests it, which would be a very significant difference. Is that right?