Tim Bajarin of Time explains that Apple never intended to incorporate a sapphire display into their new smartphones and gives several reasons for this.
For starters, this material is thicker and heavier than competitors’ similar products and it takes 100 times more energy to produce.
In addition, the cost of sapphire glass is higher. Compared with Corning Gorilla Glass, the costs are ten times higher. That would reduce Apple’s profit margin or make the device’s price increase dramatically.
Moreover, despite being more scratch-resistant, it does not absorb shock and can easily be broken if dropped.
Another reason relates to the fact that ordinary glass transmits light better than sapphire, which is due to the internal structure of the material.
Future products will probably show whether this material is fit to be implemented on smartphones.