Many ads at the time still used a strategy of "reasoning with the reader": explaining the technical benefits of the product, and how using it would make your life better in some way.
Sometime around the 90s, most advertising gradually shifted to emotional manipulation, which is empirically more effective at scale. The famous iPod ads, for example, said nothing at all about the iPod's technical merits, or how you'd benefit by using an iPod instead of other MP3 players. They just showed some vaguely cool-looking person listening to an iPod.
The "I'm a Mac, I'm a PC" ads depicted PCs as old, uncool dorks; while the Mac is fun and interesting and young. Not a word about any actual features or benefits of the Mac. Purely associative emotional branding.
This actually does work in terms of "selling more iPods at scale," though it is dissatisfying to that small segment of the population that cares about making informed and rational decisions. Most HN readers fall into this category, though there aren't enough of us in the world to carry mass advertising strategies.