How much longer will AAV/ACV last?

A U.S. Marine Corps AAV-P7/A1 assault amphibious vehicle driver with Bravo Company, Battalion Landing Team 1/4, 15th Marine Expeditionary Unit, drives an AAV-P7/A1 up the well deck ramp of the amphibious landing dock USS Somerset (LPD 25) during training to increase Navy-Marine Corps interoperability in the eastern Pacific. The U.S. Navy and Marine Corps continue to combine efforts to refine and strengthen fundamental amphibious capabilities and reinforce the Navy-Marine Corps team. (U.S. Marine Corps photo by Staff Sgt. Kassie McDole)

Question.  How much longer will AAV/ACV last?  It's quite obvious that Berger wants them gone but I've heard nothing with regard to their future/timetable for deletion from the Missile Marines.  Anyone hear anything?