"OTOH, could it be an industry scheme to trickle-down a retrograde 'feature' to mid-range phones, then re-introduce normal screens back to premium models, to hike up the long term price of a normal, usable phone?"
Then several years later they'll repeat the entire scam, only this time around they'll take the left corner out of the screen. Third time around, it'll be the right corner. Then notch at the bottom, etc. They can keep this going for some time.