I tried it before, but a relatively simple scene takes 5-7gb of data that needs to be uploaded to the server, so with my shitty internet uploading alone could easily take several days
BTW I've said it in my initial post about the steam release, but I think it's better to say it again for everyone who didn't notice: the steam version is the same version that is available here right now, there's no new content in it yet aside from a few steam specific changes I had to make. Like with the last few updates I've redone some renders and they're in the steam version already, but everything I have already done for the next update I've cut out simply because it isn't ready yet.
TL;DR: The steam release is not the update.