Dan mentions concessions as follows:
In response to feedback, Marriott will also make the following concessions through 12/31/18:
All members who have 5 years of elite status and 250 nights from both programs combined by 12/31/18 will get Lifetime Gold.
All members who have 10 years of Marriott Gold, Marriott Platinum, or SPG Platinum status and 500 nights from both programs combined by 12/31/18 will get Lifetime Platinum.
All members who have 10 years of Marriott Gold, Marriott Platinum, or SPG Platinum status and 750 nights from both programs combined by 12/31/18 will get Lifetime Platinum Premier.
I was just pointing out that on FT there are hundreds of posts regarding the future of LT status and I haven't seen these concessions mentioned there.