Congrats on your loyalty to Starwood/SPG ^
Without any bragging rights I have you slightly beat here
I can say that SPG has no such program past or present to reward lifetime achievers over these past ten years.Even as some of us approach work toward the 3 million lifetime points mark or more.
The same applies to those that earn Platinum twice over each year by stays or nights something I have done in years past.

From my understanding SPG has always felt that keeping customer expectations in check is more manageable under the present long time system.I do believe at the very least and at some point in time that lifetime Gold might be in order with certain amount of years invested at elite status and a determined point earnings threshold reached in the program
Cheers