If you read the article it is well written and makes a lot of sense. However it specifically talks about damage done to exposed seat belts to direct UV and Indirect sun rays. I do not know of anyone whose car sits outside or even has seat belts constantly being bombarded by UV rays. I think you should be extremely concerned with your passenger cars a specially those with kids in car seats who have crashes then. My observation no safety expert so bomb away!

That's why I buy a new car every two years lol. Ps Frank you better
bring plenty of belts to Santa Maria

You can buy belts nearly anywhere these days... pass the word and check your belt dates. Jan