Everything everyone wrote years ago on this thread about the AI not really offering much at all to the 270 Win is exactly right.
BUT, that said, as a looney, I would have a ball with a 24" barrel, 8" twist, 270 AI. Would have almost as big a ball with a 24", 8" twist, 270 Win, but that would be much less of a pain in the butt so what's fun about that?? ;o)
In 2022 I wonder why all .270s aren't twisted 8" anyway. Don't see it hurting the 150 grain and less bullets but opens up a lot with the new high BC heavies.
Rex