Seems to be an argument more for spaced repetition and incremental reading.
"If your collection combines knowledge pertaining to different subject domains, the stream of new ideas and unexpected associations coming to your mind may surprise you"
https://help.supermemo.org/wiki/Incremental_learning
"If your collection combines knowledge pertaining to different subject domains, the stream of new ideas and unexpected associations coming to your mind may surprise you" https://help.supermemo.org/wiki/Incremental_learning