How I almost got a Tungsten cube from @ercwl I claimed (and still do) that Fraud Proofs don't work. Meaning, the promise that "anyone can initiate an arbitration process" cannot hold. Several years ago, Eric asked me over dinner : "would you like to bet a Tungsten cube on this?" I said "Yes! I bet you that in the next 3 years, no Fraud Proof-based system will offer true decentralization of sequencer and validator, and allow a Dispute bond under $100, available to the average user." The simple reason that Fraud Proof-based systems cannot offer a Dispute bond at that price is that it opens the door to troll/DoS the system. We never formally put this into writing, and I believe quite a long time has passed, but I'm still happy to make this bet today, with him or with anyone up to the challenge.