Ilia Werner (Design Lovers on YouTube) wonders:

What is it about [glass] that makes tech giants return to it again and again? […]

Glass is not a part of our evolutionary environment.

Werner answers:

We are drawn to glass because it masterfully combines a primal, sensory lure with a sophisticated cognitive tool, all wrapped in the perfect metaphor for our digital age.

A short, thought-provoking perspective on the seemingly cyclical nature of glass (and glassy) user interfaces—from Aqua to Windows Aero to iOS 7 (a surprising but valid inclusion), and now, Apple’s Liquid Glass.