Fortunately it's possible to use the not yet mothballed nuke plants to split H20 and inject the resulting hydrogen into the natural gas supply for use in heating systems and industrial processes. Blend specifics matter, but the necessaries are well studied and adequately well understood https://www.energy.gov/eere/fuelcells/hyblend-opportunities-....
People in the west have forgotten how to address scaled emergency problem sets with physical world engineering rather than the crutch of financialization so yeah, I'm as optimistic as you are. But it would be orders of magnitude less costly and easier than sticking to the status quo, and also offers a model for potentially using intermittents like wind and solar to generate H2 for injection into the NG pipeline infra. I expect we'll see Japan making pioneering strides in this area over the coming decade, but it takes more than a parallelclimate crisis, global pandemic and return of industrialised warfare to Europe to shock business leaders, politicians and the public out of cognitive dissonance and complacency evidently.
