An indicator on VSTi instruments to see if the plugin is busy

Opening a huge project with say, lots of Kontakts loading huge amount of data. So you are waiting for them to finish, in order to get working. (You could press play but it wouldn’t sound right)

So it would be cool to have an indicator showing that they are all loaded and ready to go.

Maybe this would be a VST4 plugin specification or something like that.