This is from a Glock failure. I'm not going into what caused the failure. Here's the thing, look at the gun.
Had that frame been steel might in not have come apart like that?
Well, I'm a polymer pistol user and will continue to be one. I am a Glock owner and will continue to be one. However, instead of getting my underwear all in a bunch because somebody showed a picture of a brand of pistol I like, I will answer the intent of the thread. No, in my opinion, had that frame been constructed of quality steel in a quality manner like most steel pistols, the frame probably would not have come apart like that. Physics (and metalurgy) tells me that.
I don't get all defensive about any of my firearms unless someone is trying to take them away. By the way, even though I agree that steel "probably" would not have suffered like the polymer, I will continue to use polymer pistols.
