There's been an ongoing debate about whether or not we need more L2s. Without getting into too much of where *we* stand, the idea of new, EVM general purpose L2s is certainly in oversupply.

But, what about altVM L2s? Like Eclipse and their SVM design?

Originally, Eclipse was a strong proponent of modular scaling, advocating for multiple rollups to expand the ecosystem horizontally. But as their research deepened, they’ve seemingly changed messaging towards a different approach—one that focuses on a single, highly performant rollup that settles to Ethereum.

This isn’t just a technical shift; it’s a response to the economic realities and incentive structures that come with managing execution and consensus in a rollup-centric world.

The "one big rollup" idea? Max out the sequencer, decentralize block validation, incentivize the app builders to stay on your chain, and let the flywheel rip.

But, is this the ideal path to scaling rollup infra? Or is the appchain model a better model?

In today’s piece, we’ll explore the challenges and opportunities that come with shared sequencing—a concept that’s been gaining traction as a way to improve interoperability between different rollups. While shared sequencing could, in theory, create a more seamless onchain experience, Terry from Eclipse raises important questions about its economic viability. Specifically, they’re concerned about how MEV and execution fees are distributed across multiple domains, potentially reducing the value for individual app chains.

Also, are the incentive structures completely misaligned for rollups to collaborate with a shared sequencer?

We’ll also touch on the concept of sovereign sequencing, where applications take control of their own transaction orderings, a trend that’s gaining momentum as projects seek to capture more value and reduce reliance on general-purpose L2s. Finally, we’ll discuss the broader implications of interoperability, which Terry argues is as much a social and economic challenge as it is a technical one.

This was a really fun episode. Quite technical, but understandable.

Enjoy.

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𝗗𝗜𝗦𝗖𝗟𝗔𝗜𝗠𝗘𝗥: 𝘐𝘯𝘷𝘦𝘴𝘵𝘪𝘯𝘨 𝘪𝘯 𝘤𝘳𝘺𝘱𝘵𝘰𝘤𝘶𝘳𝘳𝘦𝘯𝘤𝘺 𝘢𝘯𝘥 𝘋𝘦𝘍𝘪 𝘱𝘭𝘢𝘵𝘧𝘰𝘳𝘮𝘴 𝘤𝘰𝘮𝘦𝘴 𝘸𝘪𝘵𝘩 𝘪𝘯𝘩𝘦𝘳𝘦𝘯𝘵 𝘳𝘪𝘴𝘬𝘴 𝘪𝘯𝘤𝘭𝘶𝘥𝘪𝘯𝘨 𝘵𝘦𝘤𝘩𝘯𝘪𝘤𝘢𝘭 𝘳𝘪𝘴𝘬, 𝘩𝘶𝘮𝘢𝘯 𝘦𝘳𝘳𝘰𝘳, 𝘱𝘭𝘢𝘵𝘧𝘰𝘳𝘮 𝘧𝘢𝘪𝘭𝘶𝘳𝘦 𝘢𝘯𝘥 𝘮𝘰𝘳𝘦. 𝘈𝘵 𝘤𝘦𝘳𝘵𝘢𝘪𝘯 𝘱𝘰𝘪𝘯𝘵𝘴 𝘵𝘩𝘳𝘰𝘶𝘨𝘩𝘰𝘶𝘵 𝘵𝘩𝘪𝘴 𝘤𝘩𝘢𝘯𝘯𝘦𝘭, 𝘸𝘦 𝘮𝘢𝘺 𝘦𝘢𝘳𝘯 𝘢 𝘤𝘰𝘮𝘮𝘪𝘴𝘴𝘪𝘰𝘯 𝘰𝘳 𝘧𝘦𝘦 𝘢𝘴 𝘢 𝘴𝘱𝘰𝘯𝘴𝘰𝘳𝘴𝘩𝘪𝘱, 𝘪𝘧 𝘵𝘩𝘪𝘴 𝘪𝘴 𝘵𝘩𝘦 𝘤𝘢𝘴𝘦 𝘸𝘦 𝘸𝘪𝘭𝘭 𝘢𝘭𝘸𝘢𝘺𝘴 𝘮𝘢𝘬𝘦 𝘴𝘶𝘳𝘦 𝘪𝘵 𝘪𝘴 𝘤𝘭𝘦𝘢𝘳. 𝘞𝘦 𝘢𝘳𝘦 𝘴𝘵𝘳𝘪𝘤𝘵𝘭𝘺 𝘢𝘯 𝘦𝘥𝘶𝘤𝘢𝘵𝘪𝘰𝘯𝘢𝘭 𝘤𝘰𝘯𝘵𝘦𝘯𝘵 𝘱𝘭𝘢𝘵𝘧𝘰𝘳𝘮, 𝘯𝘰𝘵𝘩𝘪𝘯𝘨 𝘸𝘦 𝘰𝘧𝘧𝘦𝘳 𝘪𝘴 𝘧𝘪𝘯𝘢𝘯𝘤𝘪𝘢𝘭 𝘢𝘥𝘷𝘪𝘤𝘦. 𝘞𝘦 𝘢𝘳𝘦 𝘯𝘰𝘵 𝘱𝘳𝘰𝘧𝘦𝘴𝘴𝘪𝘰𝘯𝘢𝘭𝘴 𝘰𝘳 𝘭𝘪𝘤𝘦𝘯𝘴𝘦𝘥 𝘢𝘥𝘷𝘪𝘴𝘰𝘳𝘴.

One Rollup or A Million Rollups?

The Rollup