Not sure what you mean. You can save specific shows out of PTAT and keep them pretty much indefinitely until you run out of hard drive space.I think PTA is a very good idea that Dish can really market, but it doesn't do anything for me personally. I already record the prime time programs that I am interested in watching (and sometimes don't get to them for months), so I have no use for PTA.
If you're already recording primetime programs, PTAT would allow you to record more programs that have time conflicts and only uses one of your tuners.