Simulators are programmed to behave according to the data package which is given by the manufacturer based on test flight results and wind tunnel data. The buffet will not happen unless it is programmed. The device limitation may produce less but not more. Also about deep stall etc. Simulator behaviour is not authentic in the region outside the envelope where test pilot hasn't gone and no data is provided. So such exercises are misrepresentative of actual aircraft behaviour which no one knows.