Pure-bred cats refer to cats of foreign descent, such as British short, American short, short-legged, Garfield and so on.
If they are of natural origin, such as China's pastoral cats, China's civet cats, short-haired cats and Persian cats, they all live longer and are healthier. But if it is a later breed, such as folded-ear cat, short-legged cat and hairless cat, it will be slightly inferior because of genes. However, the overall difference will not be particularly large, but also depends on the care of the owner and the understanding of the cat.
Cats prefer to be taken care of. Older people also need extra care and companionship. 18-25 years is possible when they are taken good care of.
I wish the cat health.