Glass is glass

TL;DR

Smartphone glass claims are misleading because scratch resistance and shatter resistance trade off against each other, so companies simply alternate improvements each generation.

Key Points

• 1.Scratch resistance and shatter resistance are physically inverse properties. Making glass harder improves scratch resistance but increases brittleness; making it softer reduces shattering but invites scratches — you cannot dramatically improve both simultaneously.
• 2.Corning's Gorilla Glass generations have been alternating between scratch and shatter improvements since 2007. Reviewing all nine generations reveals a deliberate pattern: one generation optimizes shatter resistance, the next optimizes scratch resistance, creating stacked impressive-sounding headlines.
• 3.Apple's Ceramic Shield follows the same pattern. Ceramic Shield 1 (iPhone 12) claimed four times more shatterproof; Ceramic Shield 2 (iPhone 17) pivoted to three times more scratch resistant — exactly the alternating cycle.
• 4.Shatter resistance claims are further inflated by non-glass design factors. The iPhone 12's return to flat, squared edges significantly reduced shattering likelihood, yet Apple bundled this into its four-times-better glass claim with no asterisk or explanation.