That was long before insulated walls, fitted carpets, double glazing and central heating. The living rooms of modern houses are often maintained at around 23 degrees, which in wine terms is just a little too hot.
Ideally most red wine should be served at a temperature between 15 and 19 degrees. If served too warm, reds can taste very “soupy” and lack in taste and aroma and South African room temperature, especially in the summer, can be much higher than 19 degrees.
So sometimes it can be a good idea to pop the bottle in the fridge for 10 minutes just before serving it.