Especially since Apple re-wrote the Finder for the OS X release right after the one that introduced Core Animation. Maybe they were trying to be a bit conservat

Especially since Apple re-wrote the Finder for the OS X release right after the one that introduced Core Animation. Maybe they were trying to be a bit conservative with the Cocoa Finder rewrite and were focused on simply ditching the Carbon APIs while preserving as much of the application's behavior and internal structure as possible, rather than more thoroughly modernizing the app. But the fact that it still hasn't been modernized in this way for more than a decade sounds like Apple's macOS developers a Microsoft-style fear of touching core components of the OS.