I looked through the 396XT Complete Reference and could not find any mention of Priority DND scanning.
My guess is that we've seen all the firmware updates for the x96 series scanners that we'll ever see. For better or worse, Uniden tends to focus on their most recent models. Makes good business sense - if they keep improving "old" models, who'd want to buy a new one?
For some reason I can't edit my OP or I would as the thread title is misleading. But NO the BCD996XT DOES NOT HAVE Pri DND but my BC345CRS does and that's my point. Why does an $85 analog scanner have a critical new feature that a $350 digital scanner lacks and needs for conventional system scanning? Both are of the same era and are both discontinued. And the new 996P2 doesn't have it either. And Close Call DND only picks up airplanes for me so I can't prioritize conventional systems without channel studder which I find unacceptable even with a 10s interval. Its really a big problem and my only gripe with my new 996XT scanner.