Originally Posted by
CPRich
US MM program was always BIS miles only, so there are no credit card, affiliate, etc., "non-flight" miles to discard. There was never a commitment to retroactively re-calculate US MM balance based on the old AA rules, and then transfer that balance. And I see no reason to expect it.
To be fair, BIS miles
did get discarded in the million-mile combining. Specifically, miles flown on, say, United and credited to DM account. I have to say that came as a rude surprise to me.