the article does provide a nice survey of clean tech, but the conclusions should be disregarded.
I don't see a future where next-gen SMR nor fusion gets to cost parity with renewables quickly or easily. They will have to scale up via beachhead markets adjacent to existing electricity demand sources.
Long term, I do think economically viable fusion will supplant renewables, but that's decades away.
in the US, had we continued to build nuclear at the rate we were between the 70s and 90s, we'd be at over 50% nuclear for electricity generation, which would have knocked coal completely out of the equation, leaving only nuclear (baseload), gas (variable demand), and renewables (opportunistic generation). over 70 years, fission-based nuclear has caused 99+% fewer human deaths than fossil fuels have.
and yes, there's no need to pin any hopes on fusion right now, which is decades away at best.