I find myself caring less and less about ransomware on my laptop because everything is in the cloud. I wonder if that is exactly what they (insert evil cloud provider here) want me to think? (removes tinfoil hat)
It will, but AFAIK Dropbox keeps data for 30 days (or can get a yearly thing). I don't know if it's possible to rollback the entire stash though, nor do I know if there's a limit in the number of updates.
> Unless your provider gives you incremental backups.
I would really hope most cloud services either do that or only push verified files (for software-specific clouds) in which case the encrypted files would fault the application and not be uploaded or downloaded.
In most of the large scale damage it is not necessarily that the ransomware was spread to all the machines, but that it accessed shared network resources.