The new MM enhancements takes place at the start of the new Medallion year: 2/1/2024. Note that the "lifetime" complimentary status is not a one-time designation, but is actually awarded on an annual basis each new Medallion year (until the next Medallion rules change). A Delta representative confirmed to TPG that the status includes getting the Platinum benefit choice for 2MM and above recipients. Both Platinum and Diamond benefits are awarded for 3MM and a above. I personally am looking forward to what benefits the mysterious 360⁰ status means in addition to the Platinum/Diamond benefits arriving 2/1/2024, as I cross the 5MM line by the middle of Nov.