The issue is that quite often the wind doesn’t blow - often for several weeks like last january - and the sun barely shines for much of the year. So renewables mean the country just has to pay for (and subsidise) a whole ton of extra infra but can’t actually retire non-renewable infra because you can’t rely on renewables. This strategy is why UK electricity is so absurdly expensive.

And when presented with this politicians and “green” sorts will handwave about pumped storage or whatever despite that basic back of the envelope calculations will show we can’t build enough of that to store 4 weeks worth of electricity for a whole country.