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AI is rotting your brain and making you stupid
(newatlas.com)
This is a most excellent place for technology news and articles.
I am referring to technological "innovations" that never made it because while they sounded good as an idea they turned out to be bad/useless in practice and also those that someone thought of in a "wouldn't it be great if we could do this" way but never really got a working implementation.
Flying cars might be a good, high profile example for the latter category. The former obviously has fewer famous examples because bad ideas that sound good at first are so abundant.