Now, the only units using 1911s used to be the USMC special operations units - the Force Recon Marines, who used Colt 1911s to great effect. However, when the Corps realize they were missing out on missions because Force Recon was not a part of SOCCOM, they decided to create a new Special Operations group ...and MARSOC was born. Now, this meant that there were still Force Recon (totally under the Corps), and MARSOC that could be tasked by SOCCOM. This also meant that there were a lot of people who required those Colt 1911s, and usage of that sidearm by MARSOC has been going down.
The 1911 works great and is an amazing firearm (better than my $2,941 Glock 19 ....weird story on that), but chances of them ever being adopted widely are next to zero. Same goes for adoption of the .45.
C'mon, give.