https://tvtropes.org/pmwiki/pmwiki.php/Main/SeinfeldIsUnfunny
It’s a kind of natural selection. The most fit pieces of art succeed so much that we see their good traits echo into the future and become the norm. But we iterate on them further and continue to improve until the ancestor would no longer be able to compete with its descendents. Audiences adapt to what was once a trailblazing stroke of genius and it just becomes the standard.
Personally, I’ve found the trend to be very true. There are very few classics that I like nearly as much as the modern popular pieces that were inspired by them. Music might be the exception.


Williams syndrome is a rare condition in humans that causes them to have particular facial features, a very friendly and extroverted personality, and some intellectual disability. It occurs when a certain chunk of genes are deleted in development.
Dogs have an equivalent region in their DNA, and friendliness in dogs and wolves seems to correspond to which variant they have for one of the relevant genes. So our domestication efforts are kind of like breeding the closest thing we can manage to a disability into them.
https://www.aip.org/inside-science/rare-human-syndrome-may-explain-why-dogs-are-so-friendly