The Viscount was designed with 1940s technology and employed safe-life concepts for major structural components. Modern design is fail-safe where in the event of a structural failure, alternative load paths maintain the integrity of the aircraft. Flying through thunderstorm areas without weather radar is incomprehensible to pilots today, in most airlines radar is no go item unless permitted under the MEL for short flights on a clear day.
The accident with VH-RMI resulted from vibration in the blower causing the oil pump retaining studs to fail, the pump separated from the blower, the blower seized and leaking oil ignited a fire which spread to the inboard fuel cell.
Aviation is much safer today because we learn from the past.