Phase C — the ZK recovery path for frozen coins — is literally marked "pending research and consensus" in the BIP text, so they're asking 90% of miners to signal for a freeze before the escape hatch even exists. P2TR outputs are in scope too, meaning this isn't just about dusty Satoshi-era P2PK — anyone who's spent from a Taproot address has an exposed pubkey on-chain and is on the migration clock. Five-year runway sounds generous until you remember SegWit took years of civil war just to hit its activation threshold.

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