Basic math.
Top of the line AMD FX-9590 processor, $260. Top of the line Intel i7-5960X processor, $1050. (blatantly lazy, I just sorted newegg's processor list by price)
Intel's performance lead over AMD, nowhere near 4x.
I can't think of a normal situation that justifies that big of a price difference for the performance. I can build a whole second AMD computer for the price difference.
Intel spent billions over the last 15 years kneecapping the competition. Any advancements they have right now is less than what we could be using today if the fight had been fair. Intel could very easily have been the top dog in a fair market, but we will never know.
So you know what, go ahead. Call me a zealot all you want. I'll just stay happy over here knowing I don't supporting a company that is actively hampering progress.