When was the last time you backed up your email? I recently moved off of Gmail to Fastmail just to make it easier to have a backup copy outside of Google's control. I keep most of my photography (500GB) in OneDrive spread across three machines and yet I still have multiple external hard drive copies just incase OneDrive does a complete wipe across all my systems.
For the apps, couldn't you create a new account (sure you'd have to buy the apps again) and be back up and running?