I've never understood pocket carry. It's not a fast draw by any means, and like a lot of others I have my EDC knife in my strong side pocket, which adds to the difficulty of drawing.
I'll take either a single stack or mid size 9 on my 3 o'clock IWB over pocket any day.
I usually go around with my hands in my pockets anyway, so pocket carry works for me. I seldom carry a knife, but if I do, it’s usually clipped to my belt.
To each his or her own.