> renewables do have the advantage that once you have the infrastructure in place it keeps working without continuously importing fuel

There are issues if the infrastructure is network accessible and is updatable. The consumer end of it (e.g. home solar) is often dependent on apps etc. and is very vulnerable. I hope (probably optimistically) that critical systems are air gapped.

Its always been obvious to me that we should have a variety or energy sources for security and its complacent to think otherwise. Over-reliance on an unstable region makes it all the worse.