Gas is an easier alternative that has a few benefits over the traditional braai. Gas braais are convenient - one push of a button and fire is instantly ready, but they lack the original smokey smell and flavour that comes from a wood or charcoal fire. Dry braai woods like Sekelbos and Kameeldoring are especially spicy and smokey, which is why they are many people's preferred choice of wood for braais.
Wood and charcoal flames are also less likely to cause a fire. Propane grills are known to explode if the tank overheats or if gas build-ups in and around the grill. Even if you have comprehensive home insurance, you probably don't want to risk an accident.