ros-navigation/navigation2

Navigation2 (Nav2) is the definitive successor to the original ROS navigation stack and serves as the foundational infrastructure for the vast majority of autonomous mobile robots (AMRs) built today. With a massive star-to-fork ratio (nearly 44%), it reflects heavy industrial usage and contribution rather than casual experimentation. Its defensibility is rooted in 'integration gravity': hardware vendors (Lidar, IMU, Drive systems) and software providers (SLAM, Perception) treat Nav2 compatibility as a prerequisite for market entry. While frontier labs like Google (via Intrinsic) and OpenAI are exploring end-to-end neural navigation, Nav2 remains the primary choice for safety-critical industrial and commercial environments due to its deterministic behavior, explainability, and modularity using Behavior Trees. The project is managed by Open Navigation and heavily supported by the community, making it unlikely to be displaced by a proprietary alternative in the near term. The primary risk is a long-term paradigm shift toward pure 'foundation models for robotics,' but even then, the low-level safety and hardware abstraction layers of Nav2 are likely to persist as the 'kernel' of the robot.