Originally Posted by
Oxon Flyer
Q : What will happen to my Lifetime Status when the programs merge together in the future?
A : Rest assured we will always recognize your Lifetime Status, whether it is today in your earned program or in the future with a new, combined program.
I guess only time will tell whether their promise to "recognize" means the same as "maintain".
Yes, that could be achieved by issuing a Gold card that states "Former SPG Lifetime Platinum" on it. There's your recognition!