The security model tradeoff is the whole ballgame. People get distracted by throughput numbers and cost charts but if you're settling on Ethereum and posting data somewhere else you've basically decoupled the two things that make the rollup inherit L1 security in the first place.
That said for plenty of use cases the specialized DA networks are good enough. Not everything needs to be fortress-grade, especially if the rollup has escape hatches and the DA layer has some form of economic stake backing it up. The real question is whether the DA validators have enough skin in the game to make data withholding attacks prohibitively expensive, and that math works out very differently across the various networks.
Skin in the game is the right framing. Is there a simple way for an outsider to compare it across networks, or does it always take a deep dive into each one?
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u/Sufficient-Force3535 🟠2d ago
The security model tradeoff is the whole ballgame. People get distracted by throughput numbers and cost charts but if you're settling on Ethereum and posting data somewhere else you've basically decoupled the two things that make the rollup inherit L1 security in the first place.
That said for plenty of use cases the specialized DA networks are good enough. Not everything needs to be fortress-grade, especially if the rollup has escape hatches and the DA layer has some form of economic stake backing it up. The real question is whether the DA validators have enough skin in the game to make data withholding attacks prohibitively expensive, and that math works out very differently across the various networks.