"It's going to be really interesting to see what happens if the Sierra has to endure another drought winter and the water from the Eastern Sierra goes down to a trickle. Would LA then do what they should do regarding conservation?"
There is a faction, even among LADWP, who think that transformational change and thinking only happen under crisis situations.
There may be truth to that.
Although it is true that LA has the lowest per-capita water use of any large city in the US, there is absolutely no doubt that there is a LOT that could be done ***without impacting lifestyle*** ---which is a key to making these things happen relatively easily. Part of it is simply educating people on what to do.
The amount that is wasted on outdoor vegetation watering is astonishing.
We already have restrictions on watering lawns, and we can't wash cars or driveways with a running hose.