YES THEY DID, they went as far as making nuclear power plants shut down due to negative prices so their reliable stable power wasn't a pacemaker anymore and it blew up in their faces. And this was a topic on TV shows with several experts alerting of this FOR MONTHS before the blackout.
Sure, there are new technologies to stabilize solar and wind's fluctuating outputs but they are no just plug and play. Those are very, very complex systems that take years to set up properly. While there are nuclear power plants are just there collecting dust because the EU pressured Spain to make them unprofitable to maintain so they would be shut down.
Luckily, the US-Israel-Iran war made the EU leadership turn and now they want nuclear. I hope it's not too late.