Like, now with the advent of AI, or even before? You might not have much love for encyclopedias, which were mostly replaced by wikipedia, but the "secondary sources don't get copyright protection" would also cover programming books, which roughly speaking are docs rewritten to a cohesive narrative.

> Like, now with the advent of AI, or even before?

My disdain for intellectual property predates the existence of LLMs by at least a decade.