Spain's blackout was exactly 1 year ago, no other blackouts since. And the mix of nuclear stayed almost the same.
That was not a stabilization problem per-se, but the companies that had to do the stabilization just didn't although the were being paid for that. Please read the final report.
The government refused to protect nuclear plants when prices went negative for a long time, so of course they were turned off because the companies were losing money. That was the obvious plan all along.
And no more blackouts because now they are running nuclear 24/7 to keep things stable.
And again, it's not completely Spain's government fault as it obviously came from the EU and their anti-nuclear stance.
No blackout for a year: nothing to see here.
People didn’t do what they said they’d do: No problem with the system it’s the people that didn’t do what they said they would do.