It doesn't pass the smell test for me. No company in their right mind would market a gun that had that kind of known limitation. Why damage your reputation with a gun that has a known weakness like that?
But yet, S&W did just that back in the '90's. The gun was the .380 Sigma. Slide was made of a zinc casting with the sights cast in place, similar to the the way Ruger machines the slide for the LCP. The slide was finished with some sort of black paint that chipped off very easily. Stated lifespan from S&W was 5000-6000 rds.
The gun had other issues, as well, like the mag release. The sides of the plastic floor plate came up, forming catches that latched into the sides of the grip. The latches were powered by "springs" stamped into the mag body and bent out behind the catches. Releasing the mag consisted of grabbing both sides of the bottom of the grip where the catches were and pressing in, then pulling the mag out. In my experience, the mag catches worked OK but not great. When new, the mags locked in well but were hard to release. As they were used, the "springs" quickly got weak and the mags were hard to latch in place, but were easy to release. Fast mag changes were NOT gonna happen with that gun. The sights also sucked hard. The rear notch was small and narrow, making it hard to get any type of decent sight picture. The trigger was also typical Sigma of the time- hard, gritty and difficult to pull well. I suppose S&W figured that no one would want to practice a lot with their carry gun.
I had one, back in the day, since small, light, compact .380s simply didn't exist at the time. .380s at the time consisted of guns like the Walther PP and PPK, Beretta models 84 and 87 (I think, if I have the model numbers right) and the Sig P230, guns that were the same size, or larger, than 9mm guns we have available today. The .380 Sigma always ran well, but I'll readily admit that I never shot it a lot. I just couldn't get over the fact that it was so hard to shoot, between the sights and the trigger, the awkward magazine release, the fact that the gun had a factory stated lifespan and how ugly it got very fast with the paint chipping off the slide and the zinc turning an ugly, dull silvery gray color. I kinda wish I had kept it for the curiosity value, but I traded it on something else and it was one of the few guns I couldn't have cared less that I sold or traded it away.
Sorry for the thread drift, just had to chime in when Borderboss said something about guns with designed lifespans.