Originally Posted by Slaninar

Chains and cassettes still differ in price.
All the pre 11 speed RDs and FDs rendered obsolete with the introduction of a different cable pull ratios.

Planned obsolescence (aided with marketing) is common in practically all the industries - bike industry alike. Getting people to buy new stuff, instead of using old stuff, God forbid repairing it. That's the way world runs today, whether one is aware of it, or not.