I'm in the same boat with my organization. My guess is that you'll be able to store the .gdoc 'files' in Dropbox and opening them will open the docs in your web

I'm in the same boat with my organization. My guess is that you'll be able to store the .gdoc 'files' in Dropbox and opening them will open the docs in your web browser, just like Drive File Stream. I'm also curious how this will work with things like Team Drives. You cannot copy a folder from one Team Drive to another (unless you're a domain admin, and even then the folder's URL changes), for example.