This is captured in the concept of the “Lindy Effect”, which says the future life expectancy of something like a book is proportional to its current age, so tha

This is captured in the concept of the “Lindy Effect”, which says the future life expectancy of something like a book is proportional to its current age, so that every additional period of survival implies a longer remaining life expectancy. In other words NYT’s 2021 best seller list is less likely to be read in 2030 than a classic.