# Not All L2s Prioritize Ethereum's Security Equally!

Source: https://app.t2.world/article/cm1dfkb61113363221mc9excti2x
Kiwi News: https://news.kiwistand.com/stories/Not-All-L2s-Prioritize-Ethereums-Security-Equally?index=0x66effbc8d5c24940c3194996ca5c1fa6d1768414a0a9d522b7490eb4d1bed3d30eeaef39
Submitted by ishitarastogi.eth on 2024-09-22 UTC, 4 upvotes, 0 comments

## Summary

The article argues that L2s differ in how much Ethereum security they pay for, and that applications should choose a security level based on the consequences of failure. It explains that rollups rely on Ethereum L1 for data availability and finality, but must pay calldata, proof verification and gas fees for that security, with about 90% of rollup costs going to publishing data on L1. It notes that blob fees rise as usage approaches the target of 3 blobs per block, while alternatives like Alt DA, Layer 3 and sovereign rollups cut costs but add risks such as centralization and liveness failures. Quoting Vitalik, it says social media and gaming do not need the same security model as L1, and it recommends security for high-value financial applications and scalability for high-volume, low-value uses.