I have to agree with Lichtgestalt.
I think Auto ISO is for the lazy people or people that don't know anything about photography or video. Even with "today's" cameras... how do you let a camera's logic decide how much noise is acceptable in your pictures or video?
In my humble opinion, its like auto-white balance, you know you're a novice if you're still using auto-white balance.
Really? I don't think I've turned off AWB since I got my 6D!
If you shoot RAW, I don't see the value of taking the time to set AWB. Just do it as a batch in post!