SimCity 2000 with Fusion plants was released in 1993. To predict that solar would do this back then is asking a lot - this graph doesn't even start in 1993:
https://ourworldindata.org/grapher/installed-solar-pv-capaci...
https://ourworldindata.org/grapher/installed-solar-pv-capaci...
https://news.ycombinator.com/item?id=20782346
(Needless to say, I don't have a high opinion of current fusion start ups.)
And fission already had the financial fiasco of the first nuclear build out in the US.
Solar could have been predicted to get really cheap, if one had heroically projected its experience curve into the future. A lot of people chickened out doing that, even Greenpeace.
It got out of the spot for a few decades when everybody started to be on nuclear power, but by the 1980s it was obvious nuclear wouldn't get there.