I get the point the graph’s authors are making, but I wonder how those projections (made in the 70s) would hold up today, knowing what we know about the enginee

I get the point the graph’s authors are making, but I wonder how those projections (made in the 70s) would hold up today, knowing what we know about the engineering challenges for each fusion approach. In other words, I’d love to see a 2021 recreation of that graph.