I must be doing something right over last 18 yrs for NOT using any "up market" or dedicated tec computer for rec or tec dive.
Money is NOT an issue but wasting it on something unnecessary is NOT in my dictionary!!
Dr. Lecter just listed some of the reasons why the Petrel is a terrific dive computer, and he even said that if money was an issue that it wasn't worth it. But I don't understand your point - no one said that it was not possible to dive with a basic computer, or even with no computer.
Also, "wasting money on something unnecessary" is a good way to describe scuba diving in general...