Why are they still jumping the old chutes?

Army paratroopers jump from a U.S. Air Force C-130 Hercules cargo aricraft during Operation Toy Drop 2012 at Fort Bragg, N.C., Dec. 8, 2012. This is the 15th year the Randy Oler Memorial Operation Toy Drop collected toy donations for children and families in need. Soldiers donate a new toy in exchange to jump with a foreign jumpmaster and earn foreign jump wings. This year, the event expanded from its traditional focus around Fort Bragg to select cities around the country. It is a Fort Bragg airborne tradition. Operation Toy Drop combines thousands of toys, Army paratroopers, hundreds of volunteers, dozens of allied military personnel, and more than a dozen Air Force aircraft. (U.S. Air Force photo by Tech. Sgt. Barry A. Loo

The caption is about the Army's version of toys for tots.  Cool.  But I'm curious about something else entirely.  Why is the Army still using the old T-10 instead of upgrading to the T-11?

If you are near or over 200 pounds then you would appreciate the advantages that the new chute will bring but I have yet to see it being used by the 82nd.  What gives?