unreliable file access/mounting/file refresh under Windows
Put data of: e.g. Session manager addon for firefox inside of an encrypted drive.
Watch session manager crash and burn because files are not accessible asap, but throws errors that files are not accessible etc.
I have to admit that, maybe, kernel driver approach of boxcryptor might be a faster and better solution whn working with rapid filesystem processing. Just a hint, not saying factually without trying out