Renewables will never replace stable energy production until the storage problem as been solved. At present there are no practical mass storage solutions available. So on days when the sun doesn’t shine or the wind doesn’t blow, there isn’t sufficient energy generation without LNG/coal/nuclear. This will be true for decades. Nuclear is currently the best option of those three. Some places are lucky with hydro generation, but even this is subject to variable rainfall. Tidal generation has come a long way, but it’s still not ready for prime time, and it also suffers from variability.