I had a few pax flights in Viscounts as a youngster, including flight deck visits which were allowed in those days. The most significant memory is the noise and the next is the turbulence. Pistons fly below the weather, jets fly above it and turboprops fly in it.
Australia may have been unlucky with its experience of Viscounts, the type was operated in Africa into the 1980s and by the standards of the time seemed to do okay.
Nearly all Viscount Pilots would be either retired or not too far off by now. An aircraft like this soon sorts out children of the magenta line from real aviators.