One of the most significant architectural shifts in VMware Cloud Foundation (VCF) 9.0 is the introduction of the VCF Installer. Replacing the legacy VMware Cloud Builder, the VCF Installer is now the unified engine for both "Greenfield" (fresh) deployments and "Brownfield" (converting existing vSphere) environments. For developers, this means a single API surface to take a rack of bare-metal ESXi hosts and transform them into a fully functional private cloud.