[ZombieBerry]

Just because you see the newer version now, don't assume they are still at work on "an old OS" (as if they are splitting their resources...they aren't) cause leaks are in the 96x range right now and we are still seeing OS updates for old handsets like the 8520.

Carriers who offer OS 7 devices still need the phones to work with their network. The older devices do not just wink out of existence when BB10 was released.