Wu said that recently the Bitcoin community has been discussing the 'Ephemeral Dust' feature, which has been merged into the Bitcoin Github mainline code. Some viewpoints consider it as a cancellation of the dust limit. According to @AurtrianAjian, this is a new transaction pool rule called 'Ephemeral Dust': when a transaction carries an output below the dust threshold, if there is another child transaction simultaneously spending that dust output, then the parent and child transactions can be accepted and forwarded by nodes with this feature enabled in the transaction pool as a 'transaction bundle'. If this rule is not met, it will still be rejected by the transaction pool. This feature provides greater flexibility and new capabilities for multi-party protocols and complex smart contracts in the Bitcoin network by allowing temporary dust outputs. This design is particularly suitable for scenarios requiring complex UTXO models, such as Ark, BitVM, and the Lightning Network.

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