cha0z_ wrote:
...Will tell you something, materials in our world are not only 5 or 6 on the scale of hardness, they can be 5.33, 5.42, 5.76, 5.8 and so on. The glass is around 5.5, but it can be also 5.7 or 5.2, etc.
Now tell me what will happen when particle with 5.4 hardness touch and drag on the screen of iphone XS that is 5.7 and then the screen of iphone 11 that is 5.2? Aha, but both will behave the same on your jerryrigs video that uses only materials with hardness 5 and 6 to test the screen. ;)
Unfortunately you haven't thought this through.
The two most abundant minerals on Earth are 1) Feldspar (Mohs hardness: 6-6.5); and 2) Quartz (Mohs hardness: 6.5-7). Both of these will scratch your iPhone 11's glass, as well as the glass of essentially every other smartphone on the planet. Incidentally, quartz is the most abundant component of sand, and sand is a major component of good old dirt.
You are speculating that the glass in the iPhone 11 is less hard than the glass in earlier iPhones, and therefore it is more likely to be scratched by some unknown, common, harder substance in the environment, whereas earlier iPhones would not be.
Unfortunately, this is illogical. Feldspar and quartz are incredibly abundant and you are constantly exposed to them. If anything is going to scratch your iPhone 11 first, it is going to be the two most abundant minerals on Earth. And the same holds true for the iPhone XS, XR, X, 8, 7, SE, 6S, 6...
We know from JerryRigsEverything that the hardness of an iPhone 11's glass is between 5.5-6.0 on the Mohs scale. Coins and typical keys cannot scratch your iPhone 11's glass. Neither can the chef's knife in your kitchen or the gold or silver jewelry you are wearing (except of course for any precious and some semiprecious stones). A stainless steel screw would definitely scratch it.
But good'ole superabundant sand and dirt is by far the most likely culprit.
And that simple fact hasn't changed one bit since the original iPhone.