Comment 13 for bug 1523520

Yeah, I hear ya. But I have limited resources and my own focus is on the casual end.

Plus, restricting it to gvfs-supported backends lets us do fun stuff like calculate how much space the backup folder is taking up or actually know whether we will be able to connect through the vpn or weird network setups, etc.

So there is a real cost to supporting new backends. I'd consider a patch for an advanced mode that allowed arbitrary duplicity backends, but it would have to be carefully done (duplicity backends are very idiosyncratic) and come with sufficient warnings about not having all features/poor support/etc.