South Africa has a long history with Cabernet Sauvignon, both as a varietal and blended wine. Highly rated examples abound, too, including many Stellenbosch-based bottlings from producers with long track records, like Kanonkop, Le Riche, Rust en Vrede, Rustenberg and Waterford, But South African Cabernet Sauvignon was never firmly identified as a consistent exemplar on the international wine stage. It’s time for…