Effect is an ocurrence that follows, or that is caused by a previous ocurrence.
An example of effect is slurred speech after having too much alcohol.
On a more expansive note there is the concept of the “Lindy” effect .
This concept is where ... "the future life expectancy of some non-perishable things like a technology or an idea is proportional to their current age, so that every additional period of survival implies a longer remaining life expectancy"
In other words, it's a good baseline prediction that old things - books, movies, ideas, media - are likely to last.
New things are likely to be fads and quickly forgotten. Fun idea?