The LA basin supports over 10 million people. Cut its water supply and the missing water has to be made up somewhere. I know full well it LA is 6 hours away from Silicon Valley but make LA run dry on water and CA-wide water restrictions would only get harsher. Remember that Silicon Valley still has a human population to support, too.
Desalination has been the technological breakthrough of next Tuesday for most of my life. I’ll be happy to see an actual deployment. Until then we wait.