I build import twin overhead cam engines with phasers on both camshafts. There are no bushings or kits to degree these cams, even if you could change it the computer is just going to move it where it wants it to be any way. And if I could move it beyond where it can adjust it I would get cam and crank correlation codes that will never go away. So no, it is not necessary to degree every camshaft. In fact I'm about to assemble a hybrid 4 cylinder Atkinson cycle engine. Am I going to degree the cams? Nope. Not all of us are stuck in the stone age as you seem to assume. So continue to assert your superiority if it makes you feel better about yourself.