Well, in that Keanu Reeves remake of an old Euro film, after the fire, all but one root-stock was dead, so they’d have to replant off that surviving root.
Most of the French vineyards are Texas rootstock and Kaliforny might be the same. This would be the native/wild Mustang Grape.
I like “A Walk In The Clouds”. Sappy and somewhat historically inaccurate, but very romantic.