We had rolling outages in the Bay Area in Alameda at least. They did two circuits at a time instead of one too. https://twitter.com/alamedamunipwr/status/156732197303394304...
The bag of tricks CalISO has to lower demand at peak is fascinating - for example, there are large consumers with significant generation resources (like emergency generators) that sign in to turn the generators on and get off the grid for a couple of hours. This produces drops in demand without blackouts per-se. Distributed power generation is generally more resilient.
https://twitter.com/nukebarbarian/status/1567358316174622720