Eskom CEO André de Ruyter has slammed critics of the utility’s move towards renewables, away from coal, arguing that their arguments are not only illogical, but akin to wanting to keep SA stuck in the “Stone Age”. “When a technology reaches the end of its life, it doesn’t make sense to continue to perpetuate it. The Stone Age didn’t end because of a lack of stones. The mere fact that we have a lot of stones in SA doesn’t mean we should have more stone tools,” De Ruyter told Daily Maverick’s The Gathering event in Cape Town on Thursday.