The great commission calls us out of a life of disobedience and into a life of holiness. Methods of doing certain things may change, but the message remains the same. Go and make disciples of all nations, baptizing them in the name of the Father and the Son and the Holy Spirit. The method of fulfilling that command may change because of culture, progress, but the message of Jesus remains the same. If we don't accept change, then there are people we cannot reach.