Kubebuilder (and operator-sdk) has been used in our team to create Golang OLM operators. Our operators have been created with Kubebuilder go/v3, which has been deprecated since go/v4 has become stable. go/v4 is the default layout for creating Golang OLM operators using operator-sdk. See go/v3 vs go/v4 for more.

The new version introduces changes to how each project is scaffolded (e.g., where the files and directories are located) and uses a newer version of tools that we currently use (e.g.,  Kustomize v5x instead of v3x).