Reframing Layer 2s: spectrum of trust models instead of “Ethereum scaling”

Vitalik’s comments on L2s highlight something that’s been quietly true for a while: L2 is no longer a single technical model.

Security assumptions, data availability, decentralization stages, and execution environments vary widely. Treating all L2s as equivalent “Ethereum scaling” obscures important differences in trust and design.

The interesting part is how different teams responded — some arguing L1 scaling isn’t enough, others welcoming specialization or native rollups.

Here’s a technical-focused synthesis of that discussion across ecosystems:
https://open.substack.com/pub/btcusa/p/are-layer-2-blockchains-losing-their?r=6y5uc8&utm_campaign=post&utm_medium=web