[TacticalCoder]

> ... but had the social clout to pause/rollback the supposedly decentralised/immutable Blockchain

Vitalik (and all DAO ETH hodlers) luckboxed in that the ETHs locked in the DAO, although "stolen", couldn't be withdrawn by the attacker before a few weeks.

There has been zero pause and zero rollback. Most people don't understand that: by chance the stolen funds were inaccessible to the attacker for a few weeks.

What Vitalik did is he forked (soft fork) the ETH blockchain to modify the rules. That soft fork happened before the cooldown period expired, so the attacker never got to access his funds.

Some members of the community said "adding new rules is against the spirit of decentralization, so we keep using the old chain". The old chain was named "Ethereum classic" while the forked chain kept the name "Ethereum".

But there's been no rollback.