Looking at outcomes and risks it seems pretty clear that we should do both. If we invest into renewables + battery storage and nuclear, and the outcome is that

Looking at outcomes and risks it seems pretty clear that we should do both. If we invest into renewables + battery storage and nuclear, and the outcome is that battery solution becomes economical viable, at worst we just spent a bit more money that we had too. If the battery solution do not become economical viable, at worst we will just have a bunch of cheap intermittent power that specific industries can use when the weather is optimal. Put in a date when no more fossil fuel plants are allowed to be built and let the existing ones be decommissioned once they grow too old. With that as a starting point everything else will just have to be planned according to demand.