sega lost because their identity is fundamentally tied to arcades and they never were able to change their proposition therefore when arcades went out of fashion with the rise of 3D home consoles and the arrival of sony and their cinematic focused model they became obsolete

nintendo avoided this pitfall but pivoting to nongamers during the wii/ds era before going back to their historical strengths with the switch, and no they're the only ones still alive and healthy while segafags can only cry and shit blood on /v/ videogaymes