There is zero benefit for MM (or even 2MM) for someone who has lifetime QF Gold (which is worth more than 2MM, the high point of AA status). Of course the 2 million miles spent on AA awards are a different story.

In fairness to QF, the example of NM's award redemption is the high point of differentiation with AA (close to the best use of AA miles and worst use of QF miles). For most other awards it is more like a 2:1 Aadvantage. Still pretty significant. However QF status does come in useful at times.