I agree the main choice is between what you feel safe with or not. I started out with semi autos probably because that is thought to be the best for CC SD. After seeing just about everyone of my semi autos fail and not liking what they use for a safety I have gone all in for revolvers for CC. Carrying one chambered in a revolver with a hammer block and a heavier trigger pull IMO is the safest gun to carry.

I feel each person has to go with what they can shoot effectively while being safe doing so. Train with whatever you choose to carry so that you feel you are ready for a bad situation and also in a safe manor.

All that matters is what works for you after much practice.