Maddening how so many classic textbooks have new versions every few years that add a few nominal features ("Calculus in the Real World!" "Online Tutorials That'

Maddening how so many classic textbooks have new versions every few years that add a few nominal features ("Calculus in the Real World!" "Online Tutorials That're Worse Than What Someone Else Made on YouTube!") with the real goal of shuffling around the exercises so a student can't do his or her homework without having the correct edition. Completely squashes resale markets.