AIUI, the problem is code re-use between drivers of different vendors but the same kernel/OS, VS code re-use between drivers of the same vendor but different

AIUI, the problem is code re-use between drivers of different vendors but the same kernel/OS, VS code re-use between drivers of the same vendor but different kernels/OSes. At the end of the day, both sides are arguing for code re-use, of sorts.