Ultimately, there is not much point justifying our own choices. Going to any system, you gain some, you loose some, which is my point. I certainly see plenty of the same tales in Nikon land. In most cases however it is just the usual nonsensical loyalty photographers have for mere tools which is both hilarious and sad at the same time.
I know that there are people on both sides of the fence stuck on some lens or camera and erect a shrine to it and overblow its significance based on some anecdotal evidence or personal experience. I'm just glad, long gone are the days were it was canon or nothing and we should all celebrate it and hope it only gets to better. The trend certainly indicates the future is very heterogeneous and there will be plenty of choice. AWESOME.
I still don't understand the either-or mentality of some people, especially gearheads like myself.
Some of us have so much invested that it really doesn't matter much what brand it is, as long as it does the job it was purchased for.
E.G. Telling yourself you need to stay with brand X because you have all the flashes and strobes that match is not a very compelling argument when what you need is a better wide angle lens and higher DR body to do landscapes. Get the better landscape gear, use your other brand with your strobes.
Not all my wrenches and shop tools come from Sears or Snap-On. I see no compelling reason not to think the same way when spending on photo equipment. Get what's best suited for the task or whatever you prefer to use for a certain task.
Dare I say, having multiple camera brands on hand, for their different strengths, is NOT tantamount to puritanical views on polygamy. Yet some people seem to be wedded to their one brand of gear, for better or worse.
I prefer polycamy far more since I've experienced it.