Half-formed thought: the bubbles in VR, machine learning and cryptocurrency are partly explained by the decline in returns to Moore's Law, which means that parallelizable problems are cheaper/easier to solve than linear ones.
(When a resource is abundant, people tend to think of ways of using it. During post-Soviet shortages, Russians had weird abundances. When all you could buy was forks, everything was made of forks!)
(this thread inspired by @firstname.lastname@example.org's column in today's Guardian)
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