Does Apple spend R&D on iPhone screens like they do Apple Silicon? What's that got to do with what we're talking about regarding iPhone's core IP (Apple's own chip, the most important IP from Apple)?
> Does Apple spend R&D on iPhone screens like they do Apple Silicon
yes
> What's that got to do with what we're talking about regarding iPhone's core IP
The iPhone's core IP is iOS.
Collaboration on display and camera development leak major future milestones. Far more consumers care about cameras and displays than the CPU. Just like the camera and display the CPU IP is also protected by patents.
Why do they keep using Samsung for their customized screens despite LG and Chinese competitors being competitive?