Just as a single anecdotal reference point...
I bought one of these back in '93. It has since had upwards of 25,000 rounds through it, plastic trigger and all with no problems other than the staked front sight, which popped out and disapeared. I had the slide dovetailed for Novaks and never looked back.
It's been carried thousands of miles in the mountains and had to be refinished twice because of holster wear and sweat rust. It was only recently retired from the role of "camping/fishing pistol" in favor of an M&P45 but it's still one of my all time favorite handguns.
Still going strong.
These are excellent pistols. Completely reliable and very durable.