I've owned maybe half a dozen 32 and 380 polymer pistols, and maybe a dozen 32's and 380's steel pistols like a 1903 or PPK.
I've put I don't know how many thousands of rounds through the Russian "commercial" Makarov that I bought NiB in 1988 or so. It hasn't even needed new springs yet.
I put about a thousand rounds through a P3AT. Then I gave it to my FiL. It malfunctioned a few times soon after he got it. He cleaned out the firing pin channel and replaced the springs. It seems okay for now.
My WAG, based on nothing in particular, is that sooner or later the metal inserts, or polymer supporting them, or
something will wear out on an LCP type pistol. They are small and tightly sprung and made of light materials. 5,000 rounds? Sure. IDC. I just can't imagine them lasting tens of thousands of rounds.
A Makarov or mini 1911 or Colt 1903 or whatever... I doubt if a normal shooter wears one out in their lifetime. It will need new springs eventually, but I don't think that something like 32acp is going to wear out a generously proportioned steel pistol anytime soon.
This 1903 is over 100 years old. It has new grips and was refinished, but the mechanical parts look original and show mild wear. I replaced the springs and it shoots accurately and reliably. It looks like it will be NBD if someone puts a box of range ammo through it once a month for another bunch of decades.
The Makarov is a tank. Good luck wearing one out. It was overengineered for its original ammo, and this one is chambered in the milder 380. It has very few parts, and they look sturdy.