How was the Helium Density Crisis of 2017 resolved?

In an event immortalised in this Google Doodle, at 4 minutes past midnight (GMT) on Jan 1, 2017, the density of Helium suddenly and inexplicably increased from 0.1664 g/L (at normal temperature and pressure) to 1.664 g/L (in the same situations), a tenfold increase of its apparent weight.

Other than causing balloons to tumble in comical fashion, this clearly had many not-quite-so-apparent effects. What were they, and what caused the most disruption to everyday life? How did we find replacements for those uses of Helium that were disrupted by this change? What impact did this event have on society?

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How was the Helium Density Crisis of 2017 resolved?

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