I'd be inclined to suggest multiple back-up locations probably ought to be include in Pro too, but don't feel quite as strongly.

Because I'm grandfathered I forget which things are no longer included in Pro, and so I'm often giving people the wrong information in my frequent promoting of Cloudron!

But yeah, I think moving "User groups and roles" and "Multiple backup sites" into Pro could also help move more people from Free to Pro too.