I'm too lazy to switch baseplates. My pinky doesnt care.

. I don't add extensions that provide an extra round or two. Although I have a few of those. In most cases, they came with the gun. Most gun-related incidents are over in less than one minute, conducted at a distance of 5-7 yards, with an average three shots fired.
I have added extra heavy metal baseplates to mags used in matches. They drop easier and faster. I'd never use them on a carry gun.
When I feel the need to get a better purchase on a handgun, I switch guns. I have average sized hands and own a few small, pocket guns. Some 9mm but most 380's. I don't care so much about trying to lengthen the tiny grips because these pistols are designed to be used up close and personal.