We'll never know the main reason or reasons google die die stick to using exynos instead of qualcomm. maybe buy bulk displays, rams and modems cheaper. google is a sw company, hence hw-wise lack expertise bah. we've seen the company build its own chips like the pixel visual and neural core with a lot of success. perhaps designing a soc using exynos semi-custom design can save time and money for google. plus using samsung modem could also reduce connectivity issues. and google concentrate perfecting their computational photography/AI/ML. like I said from the beginning, we'll never know...