IoTeX activates Zanzibar hard fork on mainnet at block 53,533,081

The operational detail worth noting is that voter rewards now settle on-chain per era, which removes a layer of off-chain coordination that previously sat between the protocol and its delegators. That shifts trust assumptions toward the protocol itself, but it also means reward distribution becomes a live on-chain process that must hold up under real conditions, starting with the first payout. The proof-of-possession checks are groundwork rather than a finished feature, so their value depends on whether BLS aggregation follows. Whether node operators complete the required upgrade without disruption is the immediate open question.