By the time this wonderful, not yet ready technology becomes available the problems will already be there. Procrastination is a wonderful idea, it takes away your options. Sometimes you are lucky, and a solution is found in time, sometimes you end up with no options.
In the UK. in 1990, 80% of electricity came from coal fired power plants, most of the rest was Nuclear; renewables were trivial.. In 2024, coal provided only 0.6%, renewables 43%, Gas 26%. in one generation, Gas came and is now declining, because it is too expensive. renewable technology existed in 1990, but was in it's infancy as a commercial option. So, what's next? Nothing in the next 15 years, that's for certain. Fusion power? If you have been following that, it has taken 20 years to build the most recent research reactors, and they cannot even get it to work yet. Commercialisation not happening before 2050, if then. Renewables are ready to take over for the next 25 years. leave the fossil fuels in the ground for the next ice-age, they might need it in 10,000 years.