semiconductor folks! I've seen a lot of talking heads repeat the claim that "a helium shortage is bad for chip production", never substantiated with useful information. do any of you know:

• what is helium actually used in the processes?
• which specific processes would be affected?
• how much helium (ballpark) is needed per year?
• where, if anywhere, a closed cycle is used?
• what happened to the strategic helium reserve in the US?