Comment: 19 pages, 5 figures, 1 tableThis paper explores the role of energy-saving technologies and energy efficiency in the post-COVID era. The pandemic meant major rethinking of the entrenched patterns in energy saving and efficiency. It also provided opportunities for reevaluating energy consumption for households and industries. In addition, it highlighted the importance of employing digital tools and technologies in energy networks and smart grids (e.g. Internet of Energy (IoE), peer-to-peer (P2P) prosumer networks, or the AI-powered autonomous power systems (APS)). In addition, the pandemic added novel legal aspects to the energy efficiency and energy saving and enhanced inter-national collaborations and partnerships. The paper highlights the importance of energy efficiency measures and examines various technologies that can contribute to a sustainable and resilient energy future. Using the bibliometric network analysis of 12960 publications indexed in Web of Science databases, it demonstrates the potential benefits and challenges associated with implementing energy-saving technologies and autonomic power systems in a post-COVID world. Our findings emphasize the need for robust policies, technological advancements, and public engagement to foster energy efficiency and mitigate the environmental impacts of energy consumption.