I'd also be interested in some statistics on the frequency of display damage. With waterproofing and these new types of glasses, I wouldn't be surprised if they had come down rather drastically. I remember every phone I having a cracked display after a year or so. But the last two generations, maybe 5 or six years, they've always survived.
Or maybe it's just my motor skills improving... But if I'm right and they are doing something like 70-80 % fewer display repairs, it becomes really hard to still assume they care very much about that revenue. There are plenty of reasons Apple would want to stop aftermarket parts, mostly of the sort you'll hear if the chef at a fancy restaurant sees the ketchup you brought from home.
150 bucks for display is fair .welcome to the matrix!
I agree with you that every parts must be substituted with genuine parts in case of component damage. I had tried to replace s6 battery and spent like $500 but alas I failed. After 4-5 month the battery gets swollen and the backcover gets damaged costing me more. So I had to dump it and I am never going to buy any Samsung shits.
I got k20 pro and I hope I can get genuine battery for it after few years.
Further such things prevents theft which is a huge problem imo. I think apple should provide user to switch these display but it should warn that the part is genuine or not, just in case.