GoCenter, a central repository for Go Modules, was phased out on May 1, 2021, due to the complexities and unintended consequences encountered while attempting to address early design choices in Go's module system. The initiative aimed to improve dependency management by ensuring that all modules had a go.mod file with declared requirements, but this approach led to issues such as checksum mismatches and inconsistent module behavior. Attempts to automatically generate go.mod files using existing tools like go mod tidy and go mod init highlighted the challenges of altering past decisions, including paradoxical dependencies and potential interoperability issues. Consequently, GoCenter reverted to serving modules as-is without altering go.mod files, aligning with the standard behavior of the Go client. This experience underscored the importance of adopting Go Modules, avoiding pseudo-versions, tagging releases according to semantic versioning, and minimizing the use of replace statements to ensure reproducible builds and enhance the ecosystem's stability and reliability.