[braythwayt]

And that goes back to Macintosh 128K.

Obviously, Apple stole mice and bitmapped graphics and GUIs from Xerox Parc. But a huge part of their pitch for MacOS in the early days was integration between apps on the platform.

Consistency of UX meant that there was lower friction for adopting new apps. Integration between apps such as being able to copy and paste text between apps from different vendors was a revelation by the consumer microcomputer standards of the day.