Popularity doesn't determine if something is obsolete or not. Function does. It doesn't matter if a pistol weighs 2.5 pounds, has eight rounds in the magazine, and costs $2500 when it is only carried on the range, no one is shooting back at you, and you're sponsored. The 1911 has seen its share of combat around the world, but that was against the Luger, Nambo, and other 8 or 9 + 1 single stack, steel framed autos. Since the P35, CZ-75, and others came on to the scene, people started expecting more from their service autos. I am on the other side. I've had access to several 1911s, even a couple with some tuning by a smith. I owned a SAO SIG P220. But I had this Glock 20 the whole time. And once you've had 15 rounds in the magazine, having the slide lock back on eight sucks. I'll take eight more opportunities to save my life before I reload over two pounds of trigger pressure any day of the week. Then factor in the weight savings of the polymer and it is literally a no brainer to me. Comparing nine rounds of .45 ACP in a 36 oz handgun to sixteen rounds of 10 mm Auto or eighteen rounds of 9 mm Para in a 26-ish oz pistol of the same basic footprint is clown shoes to me. Just silly. It's like saying a 1911 Stanley Touring is the equivalent of a 2016 Corvette.
The Glock is a working man's pistol. It is durable and reliable, and provides unprecedented amount of close range defensive firepower at an economical price. Glock revolutionized the market and because of it, they are still, thirty years later, even with all the competition, on the hips of around 2/3 of police officers. They are dominant in the civilian market and used extensively not only by the most elite in our military but that of nations around the world. The Glock is more popular and relevant on the world stage now than the 1911 ever was. And where do you find the 1911? In some American shooting sports, collecting dust in American safes, or in the hands of a few units still dominated more by nostalgia than common sense.