The mistake the author makes is to define the visual design around a generation. Which is like defining an visual design around gender. Both can be salient but

The mistake the author makes is to define the visual design around a generation. Which is like defining an visual design around gender. Both can be salient but it’s rare for either to be the dominant characteristic that centers a design. Task is generally the correct choice. Consider two apps: One is playful, coy, energetic, private and safe. The other is efficient, prudent, clear and secure. It’s likely you can confidently determine which is a dating app and which a banking app. If I told you one is a dating app for boomers and the other a dating app for millennials you’ll have a much harder time.