Triplex- The phasing out of steam in South Africa started in the '80s, but the official year was January 1st, 1990.
Spoornet took over South African Transport Services (SATS), which used to be South African Railways & Harbours, which used to be South African Railways, which came from four amalgamated railways.
Spoornet (which, in English, means Tracknet) has just had a name change to Transnet Freight Rail- a stupid name in my opinion.
Sorry, more info than needed! But ja, 1st Jan '90- Gone But not Forgotten.
Congrats TrainNut!