Define 'running'.
For SD use, I try to keep all handling characteristics same/similar. Safety OR decocker is a big issue. I don't carry pistols(for SD) that have on/off safeties anymore-only decock and return to fire. Magazine catch same/similar place. If there's a laser, I want the switches to be placed similarly.
I'm old and don't need more things to think about if/when I may need that pistol.
For SD use, I try to keep all handling characteristics same/similar. Safety OR decocker is a big issue. I don't carry pistols(for SD) that have on/off safeties anymore-only decock and return to fire. Magazine catch same/similar place. If there's a laser, I want the switches to be placed similarly.
I'm old and don't need more things to think about if/when I may need that pistol.