I only cringe because I know it is going to cause somebody to comment on it even though everyone here knows what the poster means by it. It is kind of like be lectured by some pointy-headed academic about how you incorrectly used "its" instead of "it's".
If I had to hazard a guess about why "clip" came into the American lexicon, I'd say it was WWI, WWII, and Korean War vets. Many of which first had experience with any sort of firearm in the service.
For them, "clip" was the word you used for "that which holds the ammunition".
If it was good enough for the Greatest Generation, I'd say it was at least good enough that we not nitpick.
And when I'm wearing a shoulder holster for carry, I have two magazines. If for no other reason than it counterbalances the weight of the pistol on the other side. When I use belt carry, which is seldom, I generally don't carry a spare.
I think it was Jeff Cooper who said he liked to carry a spare magazine. He said that way, after the fight, he could drive home with a full magazine.
