Performer saves setting (but not local ones like audio device, these are common to all Performer sessions) for each Cubase project that it was connected to. It also saves the “unconnected” state such that when Studio starts a new project, those should be the default, as how Performer left the app most recently. So, “If you have recurring sessions or sessions that you want to continue the next day or on a later occasion it doesn’t make sense to have to set it up all over again.” That should not be necessary, but as said, audio device, VST plugin settings etc are local and common to all projects and are considered unlikely to change with each project.