Your example inaccurately describes what would happen with GP's approach. Planning stage would generate `Delete(Server{CreatedBefore: 1621887357}))`. It would

Your example inaccurately describes what would happen with GP's approach. Planning stage would generate `Delete(Server{CreatedBefore: 1621887357}))`. It would output something like "Deleting servers created before $time$, currently $servers$." The point is the planning stage would encode the operation being done, not a list of servers to delete.