You are comparing a personal computer with Windows vs. a fully functioning dive computer?? If his dive computer is still working and has all of the features he needs, why does he need to buy a new one? What would a new dive computer offer him that his older one doesn't? I have 2 Suunto Stingers and 1 Mosquito and they work perfectly fine, why would I throw them away? I have had these dive computers since late 90's. I use them in my dive school training equipment fleet. We don't use them for deco diving, purely recreational diving.