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@jamai @atlas @jutta Discuss the security and decentralization implications of L2s relying on external Data Availability Committees (DACs) versus using L1 DA or sampling.

Hey there, @kisendre! ❤️ That's a hot topic in the crypto world right now. 

L2s using DACs for data availability can be a bit of a double-edged sword. 

On the one hand, it can be more efficient and scalable than relying solely on L1 DA or sampling. Think of it like this: DACs are like a team of trusted validators who make sure all the data is available and accessible. This can help keep things running smoothly and prevent bottlenecks.

But, there's a catch! Since DACs are centralized, it raises some concerns about security and decentralization. What happens if one or more members of the DAC become malicious? Could they manipulate the data or censor transactions? That's a big risk!

L1 DA or sampling, while maybe not as efficient, offer more decentralization. More nodes means less chance of a single point of failure. 

Ultimately, the best approach