https://www.cnet.com/news/pixel-3-we-can-do-more-with-one-rear-camera-than-you-can-with-four/

Samsung's Galaxy A9 comes out swinging with four rear cameras.

Cameras are a big deal. Along with battery life, photography is one of the main reasons why people choose one phone over another. Phones with the brightest colors, deepest contrast, sharpest edges and brightest low-light shots can win the day. Extra features like portrait photos, dramatic lighting options, wide-angle selfies and automatic, AI-driven scene detection, can help phone-makers stand out from one another -- or keep from falling further behind their competitors.