I agree Roger - AM should be kept alive, for this & many other reasons. LW Radio 4 could be kept on with a smaller TX not so greedy of power. For one example for the UK.

It seems the Spanish fault, was the sudden loss of a lot of available power from some Solar power, probably from some combining station with a fault.
This caused the rest of the system, to be unable to meet the load, 50hz frequency would have dropped to a lower frequency & other generators would have automatically disconnected as well - along with interconnections to the rest of Europe - thus Spain ended up with virtually no power, apart from standby Generators for Hospitals & UPS systems.
That's as I understand it from the info from Red Electric.