While some of your post about various calibers in the Glock line may have some truth to it. It would be fair to add that the problems that have occurred, are always being addressed and corrected as the present themselves, as with most reputable manufactures. Cure for such problematic models is to buy a later run of said pistol. By then you should have a pistol that runs like it should.
Go Glock, Kahr and Ruger..... I'm a fanboy of anything that works as it should.