UBIFS corruption and UBI + unstable bit questions

[Morand, Guy]

Hello UBI developers,

I was wondering what happens to the UBI volume if an UBIFS partition gets 
corrupted:
* Is only the partition corrupted?
* Is the whole volume corrupted?

Moreover, about this "Unstable bit issue" ... 
* Does it still make sense to use UBI/UBIFS as it doesn't seem to be fully 
  power cut failsafe?
* Have you planned to fix this issue?

Best regards,

Guy