I'm starting to worry that based preconfirmations lead to too much centralization pressure, creating a small oligopoly of shared sequencers and provers. Is this really better than centralized sequencers (which can also give preconfirmations)? At least the centralization here is per rollup and not global.

Why does it lead to centralization? Is it because of the capital req’d to back the preconfs? I thought with Eeigen, this kind of capital is relatively cheap/easily accessible

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I'm more worried about integration with builders, special relations due to order flow, and proprietary software for processing (synchronous) transactions across different rollups.