Switching carriers is easy. (provided you are out of contract and don't mind signing a new one, or paying ETFs)

Knowing that your phone of choice is on the carrier that doesn't get reception in your home and drops your calls constantly, means that it does in fact, matter which carrier you choose.

I read your comment as though you were saying that the process of switching carriers was the challenge, which is not what I was saying. If that's not what you meant, then I misinterpreted it.

As for it being hard to imagine the iPhone falling flat ... well, I provided graphs and links to industry sites. I'm certainly not the only one seeing it turning out this way.