And to date they still have the slickest interface and best UX!
It's totally true. You see it all the time usually in things that are failing. People hate that old shit. I think it's why Apple became so successful with their phones because they abandoned all the deeply buried menus of previous OS's and went for something simple and straightforward
I found that book very useful. Although our industry is far apart for tech and media, but principles can be applied unchanged.