I've been wearing a fanny pack (stupid name for something at 1:30 on my starboard side) for decades. Glock 32, wallet, Swiss Army, cards, pen/pencil, notepad ... heck I drag so much stuff out of it that nobody guesses there is room for a .357 Glock too... not that I care a whit if they guess I'm packing. I like that I can snap it on when I'm going out and be fully loaded.
A past national bullseye champion once told me it was too slow to draw from. I said I can have it out, on target in two seconds. Where's yours?
His sheepish answer said it all: "At home in my safe.".
Yeah my IWB would be quicker, but I just haven't adapted my wardrobe to cover it.