19 years ago when I bought my first handgun (Gen 2 Glock 19) I liked the fact I had 16 rounds at the ready. I never saw the need as a civilian to carry spare magazines. I'm not in law enforcement; why would I ever need more than 16 rounds. I get it that 1911 style and single stack pistol CCers need extra mags. My attitude was if I needed more then 16 rounds, I wasn't in a defensive situation. I was in a gun battle. I just don't foresee myself in a gun battle. I didn't want the extra weight and loss of comfort.
Lately I have been thinking about it more and have decided to give it a try. Not much different except the first time I sat down in my recliner I pinched the heck out of my spare tire with the magazine. OUCH!