Not really. Storage is most used for short term stabilization and alleviating congestion in certain transmission nodes. In most markets its used to provide capacity under contract with utilities to meet resource adequacy requirements which don’t consider long term regional complete loss of renewables. Longer term storage that can provide power to, say, a whole region during a multi-day storm is basically an uneconomic fantasy that rational developers have no real incentive to build, because it would be a huge overbuild most of the time, and accordingly undercompensated for said overbuild. Developers are building batteries that are just the right size for a capacity contract & providing ancillary services (voltage support, frequency regulation, etc) plus price arbitrage, which are deployed for only minutes to a few hours. There are some 8 hour duration batteries out there, but they are not common.