AFAIK, nothing in the lifetime program has changed. So even though some of the lifetime info here on FT maybe a year or two old, it should still be accurate.

Also, I don't think there has ever been anything definitive posted here or officially released by Marriott on the requirements for Plat Premier status. The closest I have seen here is that the guess that Plat Premier is given to the top x% of Plats in terms of revenue generation (where "x" is some arbitrary number). If that is true, then the actual requirements would change every year based on the stays from all of Marriotts Plats for the previous year.