ah ok, good point – so the proposer will be slashable on Ethereum, but again this slashing might be much less than the actual MEV opportunity that they steal from the builder. i agree that this is the same issue as is present in the optimistic relaying endgame! we wrote a post on this type of attack after the Low Carb Crusador – Equivocation attacks in mev-boost and ePBS. ePBS addresses this because the attesting committee won’t attest to a block that they see as equivocating. So in this case the unbundling won’t be profitable for that builder because they will not land a block on chain and they will be slashed. maybe that is the key differentiating factor that ePBS offers!
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