Hi AABigRick,
I began the quest for the best (for me) concealed handgun many decades ago. I bought a Model 60, which was then the definitive off-duty gun. It is an excellent gun. However, it's critical limitations cannot be ignored. It is the quintessential belly gun. I call it a neck and up gun. At the distance it was intended to be deployed, if a bad guy's CNS was not incapacitated, it would've been likely that I'd have taken rounds. It is a one bad guy gun. Bad guys rarely commit bad acts alone. Reloading it requires a lunar cycle. Under stress, it would require two ;-)
If feasible, I'd carry my Springfield Armory TRP .45 ACP everywhere. It is my wilderness handgun. It's too big for urban carry.
I've never been a huge fan of the 9MM. It is a decent self-defense cartridge. When matched with a perfect self-defense handgun, the 9MM becomes more than sufficient.
After a lot of research, I bought a Springfield Armory EMP 3 9MM. I've had zero buyer's remorse. With help of Springfield Armory's excellent Law Enforcement Customer Service (especially the most wonderful Lexi), I have the Holy Grail of urban self-defense handguns. Loaded with 10 rounds of 147 grain Fed HST LE (standard pressure) with a spare mag, it's the ultimate self-defense handgun. Because it's a 1911 design, there would be no muscle memory conflict.
I have a friend who owned (he wisely sold it) a reputable brand (not SA) shorty 1911-A1 .45 ACP. I watched him and another friend fire 230 grain ball ammo out of it. Recoil caused its muzzle to point at their ceiling, which isn't good unless bad guys are parachuting. From my research and watching videos of the EMP 3 9MM during actual firing, my worry about controlling a shorty 9MM firing 147 grain rounds was substantially reduced. After firing a box of duty ammo through it, I was astonished at the ease that I could keep my EMP 3's muzzle on target. Requiring sight picture after each round fired is a severe tactical disadvantage. A gun's muzzle must always remain on target. With 147 grain duty ammo, I experienced no difficulty keeping my EMP 3's muzzle on target.
There are many excellent concealed carry self-defense handguns available to survivors. Hand gunners would be hard pressed to find one that's superior to the Springfield Armory EMP 3 9MM.
One last point: I have complete confidence in my EMP 3 9MM. It is completely reliable and unbelievably accurate.
If you're in the market for an easily concealed self-defense handgun, my recommendation is the Springfield Armory EMP 3 9MM.