Our group introduced the concept of magnetless nonreciprocal metamaterials ten years ago [T. Kodera, D. L. Sounas, and C. Caloz, Appl. Phys. Lett., 2011]. Since then, this research topic has exploded in both the engineering and physics communities, with hundreds of related papers being published every month, including our critical perspective in [C. Caloz et. al, Phys. Rev. Appl., 2018].