Coinbase's two-layer chain Base has enabled proof-of-failure on the mainnet. According to a blog post by Base "Proof-of-failure is an important part from Stage 0 to Stage 1, where cryptocurrencies have'full training wheels', while in Stage 1, cryptocurrencies have'limited training wheels'. This year, the Base core team worked closely with Optimism to bring the OP stack error proofing system to Base. This enables a decentralized approach to proposing and verifying L2 status and paves the way for more community involvement.