Something like a 1911 has a questionable reliability track record depending on the conditions they are used in and the type of magazines they are using. Pistol magazines have evolved and improved as much as firearms and the reality is metal guns aren’t in the same category as polymer guns just based on lubrication and climate conditions. There are many firearms out there that will function reliable if lubricated properly and cleaned properly, but polymer guns are the future.
Glocks are the toughest handgun in existance according to the most experts. There are always arguments about the conditions various firearm manufacturers are in and how they will handle it, but the reality is the Glock pistol needs less lubrication, doesn’t rust, and the magazines are designed as reliable as the gun and there are plenty of Glock Magazines on the market to void out the mayhem that aftermarket mags can do to a firearms reputation.