What's @sgoldfed's answer to people who say Ethereum doesn't work and that all L2's are centralised?

Although some L2's are centralised, @arbitrum passes the "gun-to-the-head test":

- no backdoors

- no veto powers

- just trustless decentralization

That's why Arbitrum is universally regarded as the most secure and decentralised L2 that exists today on Ethereum