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Nobody is coming across as entitled as far as I can tell. This is evidently a software tool, and there is nothing in the iPhone 13 that dictates that the iPhone 12 couldn't run this very basic filter. I would be willing to be a large amount of money that any phone capable of running iOS15 would be able to run these "photographic styles".

Apple has intentionally withheld software features from older phones for... reasons?
Because as a corporation they need to always increase their income to stay in existence.
 
All processing loses information. Just imagine until now you’d always been using a Photographic Style called “Apple Default”.
Ahh. I think I understand what you’re saying now. However, if captured in RAW, “Apple Default” isn’t applied, yes?
 
“We don’t know what to do with the camera app” option.
Sorry, but the skin tones DO seem to change. Just a soft filter. What a waste of CPU power. A million things the cameras in Chinese phones can do, and Apple only can think in color filters… I see why USA banned X company… fear of losing leadership in innovation.
Wow veiled comment form someone having internal issues with a feature that benefits so many others that’s been neglected by cameras since their inception. Was wondering how long this would take. Lol
 
DP Review has a very good in-depth article on the iPhone 13 cameras, if anyone is interested. They briefly discuss the photographic styles and the computational steps that are happening:

 
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