I happen to collect old vinyl albums (jazz, rock, etc). Provided that the records haven't been over-played with a heavy needle, they play just fine. Some of my albums are close to 60 years old.
Now granted records are not the same plastic used in polymer guns, and they aren't exposed to the elements (sunlight, weather, dirt, etc), but plastics are very durable these days. Also consider the pvc piping that is used in modern sprinklers, or drip systems, etc.