Have we learned anything from this blackout?

On Las Mañanas de RNE with Mamen Asencio, we reflect on the historic blackout of April 28 with David Pastor Vico in "Parar y pensar." We interviewed Javier Rupérez, president of the platform in defense of cash. Due to power supply failures, the card terminals were not operational, so the only option to buy food, batteries, flashlights, or candles was to pay in cash.