Fusion is one of those things that require input from another field of study to work.
In this case, superconductors. Get better superconductors and the whole thing could get wrapped up in a hurry, without it, it is like trying to build human powered flying machines: even if you could, it wouldn't have much practical use.
“The World of 1971”
Some of the predictions for 1971:
2) The “middle class” would be working high-paying skilled jobs and would make up 80% of the population
Definitionally impossible. Income level that covers 80% of the population is by definition working class and not "middle" class.
Many countries have gone through rapid economic growth, especially in asia, that resulted in real income growth of multiple times over a life time.
You know what, people are still pooooooor man, because rich people's income grew faster~
There is no technological solution to zero sum competition. As other problems get solved by technology, zero sum competition is what will increasingly drive human behavior.
We'll be transition to a 100% lawyer-activist-bureaucrat society sooooon~ No machine could replace the proper righteous anger of a snowflake~