Anyone who tells you that the computer you have will not be outdated in 5 to 10 years probably has excessive amounts of Nitrogen in their system. It only took a couple of hardware and firmware updates on the Petrel within the last two years and all of a sudden the For Sale classifieds on SB where filled with original Petrels for sale so that folks could pick up a new Petrel 2 with a digital compass and Smart Ready Bluetooth functionality - and that's with the same manufacturer and model. No telling what major improvements in PDC technology are in the distant horizon.
Granted that a lot of deco theory and algorithm programming has remained fairly constant in the past few years and major breakthroughs in deco theory and computer technology have yet to really show themselves, but there are constant improvements in screen technology, battery life, size and durability, design aesthetics etc..
So don't worry too much about the future and how long your computer will last - get what you need now and find something that suits your diving style, has a user interface that you're comfortable with, and fits your budget.
FWIW I dive with a Petrel and it is one kick-ass dive computer. For now, I couldn't be happier.
Granted that a lot of deco theory and algorithm programming has remained fairly constant in the past few years and major breakthroughs in deco theory and computer technology have yet to really show themselves, but there are constant improvements in screen technology, battery life, size and durability, design aesthetics etc..
So don't worry too much about the future and how long your computer will last - get what you need now and find something that suits your diving style, has a user interface that you're comfortable with, and fits your budget.
FWIW I dive with a Petrel and it is one kick-ass dive computer. For now, I couldn't be happier.