That seems like a good idea on the surface, but there is value in things like philosophy that have lasted the test of time[1]. They've proven a level of robustness. Also if you just take a sample from a relatively short period, like 2 decades, there's danger of it reflecting current fashions[2].

1. https://en.wikipedia.org/wiki/Lindy_effect

2. http://www.paulgraham.com/say.html