Originally Posted by BMGRAHAM

It says "We will continue to recognize your existing Lifetime Status in the program where you earned it today, and in any new, combined program in the future." That seems unambiguous to me. The only thing I can see might happen is that Lifetime Platinum in SPG might not match Lifetime Platinum in Marriott, since you need more nights for the latter. I hope not since they matched those two statuses for non lifetime.