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Ukraine previously sold half the neon used in semiconductor manufacturing, between Mariupol and Odessa.

What eventually happened with the neon crunch? Those cities are still under Russian control, correct?

I have seen responses that conservation efforts have allowed the industry to make due with less.

Odesa is not and has been hit less than more Eastern cities. OTOH I'd assume Ingas in Mariupol ceased to exist for practical purposes.

Actually, Ingas the company very much survived and moved to the Odesa region (https://ingas.ua/en/pro-nas/).

And they still have Neon in their catalog so most likely another case of impressive Ukrainian resilience.