JohnKSA,
You are correct, no one knows
EXACTLY how the polymer will hold up in the future. That is how I should have worded my posting.
My point is not that the polymer will fall apart in the future. I hope not, mine were expensive. My point, (and I should have been more clear), is that I personally do not know what it takes to degrade the tensile strength of the polymer to the point that it may succumb to abuse and break/crack.
Being unsure of something is not the same as saying it is useless.
Semantics. Either the polymer is still functional or it's not still functional and therefore useless.
I was thinking not of total failure, but of a crack in the grip/frame. The pistol will still work, but it is weakened.
This makes me think of the UHMWPE (Ultra High Molecular Weight PolyEthylene)that we use in orthopedics. The stuff is tougher than nails, but does degrade over time. Even when there is no visual evidence of the degradation, it can be deposited in other parts of the body. I've sen the stuff crack, break, split, fray....you name it. This in part causes some of my distrust. Overall, the components will last decades in similar people. Sometimes I've seen them fail after 6 months to a year. Although that is rare, it does happen. The metallic components may loosen over time, but they are OK. I know that the stress of a joint that is used constantly is greater than the stress placed on a firearm. I am definitely trying to compare apples to oranges. I am only trying to explain my position that even with the best of testing our knowledge about what weakens the stuff is still limited.
I will continue to use polymer in my daily life. My daily life makes me question it's integrity. I know it fails and I watch for it everyday. When it fails, we go back to work and replace components, with more UHMWPE.
FWIW, I'm enjoying this. I am learning more about the polymer itself. I know I'm new here, I'm not trying to be obstinant, just want to learn.