Each vintage is different because the weather is endlessly variable. Some vintages on average are cooler others warmer yet even cooler or warmer vintages are not equal as they are made up the variations of each day.
However, the great vintages are associated with a normal, steady ripening, plus an extended period for picking without being rushed to harvest. The wine maker when asked to comment replies that the wines made themselves. Such was the 2021 vintage, the 14th for Karrawirra.
When searching for a bottle to buy in wine store customers often use the variety and/or the place of origin as clues for what to buy. Can there be a better wine than Shiraz from the Barossa Valley from a good vintage? I think not and this vintage of Karrawirra is guaranteed to give drinking satisfaction.