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This is when which blockchain it's on really matters. DEI is on Fantom. Unclear who controls that. It's a "consensus blockchain", which means some group of operators has control.

With UST, the issuer controlled the blockchain and shut it down completely.

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>With UST, the issuer controlled the blockchain and shut it down completely.

The issuer didn't control Terra. The Terra blockchain is unable to come to connesus about creating a new block if 33% of the staked Luna goes offline. You just have to get the largest validators to agree to go offline and it will stop.

Hm. Is that a potential failure mode for other proof of stake blockchains?

This is speciﬁc to tendermint consensus. Casper consensus doesn't seem to do it.

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