In the late 80s, Eskom had the (very belated) foresight to realise that the apartheid govt was taking us nowhere, and conceived the electricity for all vision, helped by its complete overplanning of power stations. The period during the 90s (a few years before democracy and a few years after) was when most of new connections to citizens were made. The democratic government inherited massive apartheid debt and an even bigger infrastructure deficit (water, sanitation, education, health - you name it) which had left most South Africans impoverished and the country cash-strapped.
The new government did a miraculous job transforming that and we should all be grateful. They did make mistakes and especially in energy.
It is the specifically the government of the last few years that has failed to continue the transformation and let us down in every conceivable sector and taken us into crisis of corruption and lack of delivery.