Are you a 1911 fan?
In this day and age there is a much larger selection of different size and shape handguns then every before in history.
Ask a hundred instructors what the best gun for concealed carry and you may get a hundred answers. And every one will have objective, subjective and fact based reasoning.
Fifty years ago, there were not so many selections to pick from. Back then, you had revolver fans and then semi-auto fans.
In revolvers, there were Colt (Cobra, Trooper and Python) or Smith & Wesson (J-Frame or K-Frame). In semi-autos, it was Colt 1911s or Browning Hi-Powers. There were very few other firearms that supplied the reliability, parts availability or service availability. These were the standard for military, Leo and civilians.
Today, Glock, Sig Sauer, S&W M&P and FN dominate the Military and LEO community.