Ethereum researcher Dankrad: Never breaking existing contracts is not feasible

Techub News News: @dankrad tweeted that "never breaking existing contracts" is not feasible, because it would mean the gas schedule cannot be adjusted and signature schemes cannot be deprecated. He suggests clearly specifying which contracts will not be broken; if a contract relies on the gas schedule or state commitment, it needs to be upgradeable, or users should be made aware that in certain cases they must exit.