Keywords: The Rocker Project provides widely used Docker images for R across different application scenarios; This article surveys downstream projects that build upon the Rocker Project images and presents the current state of R packages for managing Docker images and controlling containers; These use cases cover diverse topics such as package development; reproducible research; collaborative work; cloud-based data processing; and production deployment of services; The variety of applications demonstrates the power of the Rocker Project specifically and containerisation in general; Across the diverse ways to use containers; we identified common themes: reproducible environments; scalability and efficiency; and portability across clouds; We conclude that the current growth and diversification of use cases is likely to continue its positive impact; but see the need for consolidating the Rockerverse ecosystem of packages; developing common practices for applications; and exploring alternative containerisation software