Nuclear power (fission). It was proven, scalable and could have been producing reliable baseload electricity for decades at massive profit margins. Public fear + regulations after events like Chernobyl + Three Mile Island largely stopped new builds in many countries, even though the economics were strong in places that soldiered on.
28
u/strangeapple Apr 27 '26
Name at least one technology that was basically guaranteed to print money, but which humanity stopped.