Why the potato is the pick of the Irish crop

We have an affinity for potatoes and spuds are the quintessentially Irish food, but they were introduced here from South America — and China is the largest producer of potatoes.
In countless households throughout the country, potatoes (the more floury, the better) are cooked every day and a plate void of potatoes would not be referred to as dinner. Is it any wonder that the majority of Irish consumers are more selective about potato varieties than that of any other homegrown vegetable?