I had my iCloud backups for my iPhone corrupt and I lost months of text messages. Fortunately everything else was backed up. Apple was unable to help recover anything. I will not be jumping on this store all my stuff with Apple. I need tridundancy between different cloud providers to have any semblance of faith I'll be able to recover my data if something happens to my device.
1. You lost your device at the same time as your iCloud backups were corrupted? How did they even get corrupted? I've never heard of that happening before.
2. If you're worried, you can always do local backups with iTunes.
