It‘s most fascinating when you realize that wind & solar will, very soon after being competitive with new coal and gas, become cheaper even than existing fossil fuel plants.
That’s because renewables are almost entirely front-loaded: upkeeps is somewhat neglible in comparison to construction. For fossile fuels, the fuel itself is a dominating cost.
Meaning: in some countries, we are on the brisk of an inflection point, after which growth of clean tech will be limited only by our ability to increase production. I saw a graph, which I can unfortunately not find now, predicting 2021 for some European countries and some regions in the US. There isn’t much speculation in a time frame of only two years.