The 1947 Golden Age SF is interesting because the "rocket fanatics" peaked in 1969 and humans haven't gone back to the moon, let alone conquered space. While the transistor succeeded to an extent nobody imagined due to the magic of compounding improvements.
> You see a stupid silly black fleck floating over a magnet
Meanwhile over in the AI "optimism" channel people are telling us that AI will be able to produce videos of anything that are indistinguishable from reality, and that we should all learn never to believe video evidence again.
I'm still very much in the "don't know" camp on the superconductor, but what I do know is that it's not worth getting excited until we know it's real.