As an ex-vinyard owner, this makes little sense. A percentage of the vines on a vinyard are constantly being replaced due to disease or mechanical damage. The

As an ex-vinyard owner, this makes little sense. A percentage of the vines on a vinyard are constantly being replaced due to disease or mechanical damage. There is absolutely no shortage of new vines. They can be grown from cuttings, or by laying down (uncut) canes. But in practice, most commercial vines are hybrids which have been grafted onto Briar(and other) root-stock to avoid disease and increase yield. Some farms grow their own, but most buy them in from specialised nurseries. The availability of new vines is absolutely not a bottle neck to making wine.