Industry 4.0 has moved from a manufacturing slogan to a central concern of supply chain management (SCM). This review synthesises the literature on the two topics using 1,638 journal articles and reviews indexed in Scopus between 2017 and 2026, and it combines a reading of the most influential studies with the bibliometric evidence produced for this project (science mapping in Biblioshiny). Five conclusions emerge. First, research output has grown from 10 documents in 2017 to 301 in 2025, with a cumulative citation count of 88,572. Second, the field is organised around a motor theme of supply chains, decision-making, and artificial intelligence, surrounded by large clusters on sustainability and the circular economy and by smaller clusters on the Internet of Things (IoT), blockchain and resilience. Third, the most cited work is conceptual, review-based or survey-based, and few studies test technology effects with longitudinal or experimental designs. Fourth, scholarship from emerging economies, above all India and China, now dominates by volume, which has shaped the field's attention to adoption barriers and sustainability. Fifth, the field is moving from Industry 4.0 towards Industry 5.0, where resilience, sustainability and human-centricity are treated together. The paper closes with a future research agenda.