The emergence of AUTOSAR architecture changes the development process of vehicle control system and revolutionizes the industrial chain. This paper first explains how the introduction of AUTOSAR system architecture affects entire software ecosystem, followed by discussion of difficulties that AUTOSAR ecosystem participants will be encountering from four different aspects - software migration, complexity handling, compatibility, and software engineering management. Finally, two cases, namely the AUTOSAR approach for functional safety implementation and the all-new software ecosystem, are used to demonstrate the opportunities and trends of AUTOSAR.