I am surprised but the narrow focus of this discussion. It's most appears to be based on carry guns. That is more than a little myopic. Yes the 1911 is large and heavy. That also makes it idea for other applications like hunting, target and actual combat usage.
My daily carry is a 9mm Sig 365XL. With 12 rounds and a red dot in a very small light package that is relatively accurate it is a good match for my threat level. That being said if I knowingly am going into a handgun fight I want my 1911's. I would prefer my double stack 1911's but my single stack would be fine also.