****I'm almost embarrassed to say I have a very very well respected brand of .45 that cost me a stupid amount of money, that has more wear showing on key parts, than your Glock, after perhaps 5000 rounds.. It's super finicky about ammo, and magazines. I was told it would break in after 1000 or so rounds and stop jamming, since the gun was built "tight". I have most every 9mm Glock made in either Gen 3, or 4 and none has ever required a break in period, and they shoot pretty much whatever I put through them, accurately. I have the paperwork from my .45 showing bench rest accuracy at 25 and 50 yds, and it is indeed impressive, but no way I trust that gun with my life.
The Glock is an amazing piece of engineering, simple to maintain, and reliable. No question what I use for a home defense gun (Several Glocks, and a simple S&W .38 revolver). Obviously, if I'm expecting big trouble (Chupacabras, zombies, the T-1000..) I go for an AR, or Pump Shotgun (duh...!) .
Anyway, I compete with a Glock 34, and my main gun has mebbe 20k rounds through it now. I've replaced the recoil spring, and had trigger work done to it, but the main parts are original and the finish on the slide, and barrel are *just* starting to show wear now. Amazing to see a gun with over 86k rounds still working!