system
Given the following post, respond as if you're commenting on Reddit:
human
[Foundation] These stories are set thousands of years in the future. Why are fossile fuels and nuclear power still a thing?

I mean, they have interstellar spaceships, why aren't coal, oil or nuclear fission long forgotten? Don't they have fusion or something even more advanced?
gpt
They did. The whole point is that the advanced tech collapsed with the empire, so planets suddenly had to reinvent from the ground up. Also, when they are talking about the foundations nuclear power they are talking less about just a fission generator, but more tech controlling nuclear forces in general. Much more advanced.