One theory.
- Many who served in the service used or was familiar with the 1911 told stories of 1911 achieving amazing feats saving their lives and how good the 45ACP was in knocking down enemy combatants
- Many growing up seeing the 1911/45ACP in the movies and the dramatic effects it had on the targets (bodies being lifted and thrown back several feet or through the wall/windows, etc.)
- Many during impressionable teenage/young adult years reading various gun magazines showing high-end custom 1911s considered them to be the "epitome" of semi-autos to be had as many gun writers wrote in the articles
Now, these kids are grown up and working to make enough money to support their hobbies. As their shooting hobby and passion grows, they are slowly fulfilling their childhood dreams and fantasies. Some may started to consider match shooting. What do they see at the top of the local/regional/national matches? Yes, 1911 platforms. As many military/police elite units add 1911 to their operations (i.e. Kimber SIS), the storied heard become more ingrained as to the virtues of the 1911 and 45ACP. "They must be true - I must have the 1911 to fulfill my destiny as a shooter."
So the legacy of the 1911 perpetuates amongst them and they tell their kids the same stories they heard. 1911 and 45ACP combo is awesome. When you are starting out in life, buy a cheap but reliable semi-auto for protection, but when your finances improve, buy yourself a 1911 in 45ACP.
Maybe.
I maintained 1911s in the service for our unit as Beretta 92FS was being considered to become M9. I fell in love with my first 1911 I bought and did all the work (it was original only of the frame and slide - all the rest was Wilson Combat). Even though I have gone over to the dark polymer side of Glocks and M&P, I long to be one with the right 1911 again ... some day.