This is claptrap: "This effect helps us add depth and realism to our projects." -- when was the last time you, dear reader, saw frosted glass? Let's be real: it's because it was in iOS 7, Apple never moved on from that look and feel, and Apple is Apple. (n.b. a winking opinion, and a mild homage to Apple lore, not a genuine rebuke: https://folklore.org/Round_Rects_Are_Everywhere.html)