Dummies guide to native rollups: L2s as secure as Ethereum itself

Your guide to the differences between Native Rollups and Based Rollups, and how they make L2s as secure and composable as Ethereum itself.
All of a sudden, it seems that everybody in the Ethereum ecosystem is talking about native rollups, with Ethereum Foundation researcher Justin Drake saying that everyone he’s spoken to about the proposal has been immediately supportive.
Optimism, Base, and half a dozen other L2s have expressed a desire to incorporate the tech into their platforms and some also want to also become based rollups for good measure.
But with Drakes January post on EthResearch aimed at a technical audience and most other explainers using the arcane terminology of blockchain devs, many ordinary Ethereum supporters may be left with little idea what native rollups are or how they work.