I have a good buddy who is retired special forces, and he has a Glock 19 that he swears he has put over 50,000 rounds through. I believe him, because (1.)I know how much he likes to shoot, and (2.) he used to operate a shooting range.
I am of the opinion that there simply isn't another pistol out there than can compare to Glocks in the durability department. Revolvers are a different story, of course, but you aren't asking about revolvers!