Historical retrospective · Ethereum
Spurious Dragon combined state cleanup with protocol changes
The November 2016 upgrade included measures addressing denial-of-service pressure and cleaning up problematic account state.
Network security sometimes requires rules that distinguish empty or abusive state from useful on-chain activity.
The fork followed Tangerine Whistle quickly, underscoring how emergency fixes and planned roadmaps can overlap.
Rapid upgrades demand careful client coordination and transparent communication about what users and operators must do.
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