Hi, my 2009 MBP 17" still runs 10.5.8. Many new apps don't support Leopard. Is it worth buying the Snow Leopard disk and upgrading, or at this point should I go all the way to 10.8? I have tried SL and like it a lot, much better than Lion/ML. But is it likely to slide off the list of supported OSs soon? I know there are a lot of dedicated SL users out there, but that hasn't stopped Apple from abandoning users in the past...