Thanks to cultivation dificulties as well as bad image from previous times (thanks to big yields it use to be used for poducing cheap table wines) make this varietal slowly dying: old blocks are being replanted by other varietals.
I think it is a pitty as St. Laurent wine is very interesting and quite memorable. Luckily I've bought few blocks with old vines and I am selecting plants with loose bunches and am trying to create new clone with more favorable growing characteristic.