"Fusion Energy: Research at the Crossroads - ScienceDirect" https://www.sciencedirect.com/science/article/pii/S2542435119301254 https://www.sciencedirect.com/sc

"Fusion Energy: Research at the Crossroads - ScienceDirect" https://www.sciencedirect.com/science/article/pii/S2542435119301254 https://www.sciencedirect.com/science/article/pii/S254243511... Figure 1 has an update showing that the exponential trajectory has stalled.