Nearly-zero cost attack scenario on Optimistic Rollup

For once I agree with Zamfir, in that the idea that Ethereum is unforkable because of centralized projects masquerading as DeFi, or because of DeFi, is nonsense.

https://twitter.com/VladZamfir/status/1190329078798147585

https://twitter.com/VladZamfir/status/1190337137100513280

For what it’s worth, I share this same sentiment, and I’m very much a PoW maximalist at heart. However, the Ethereum community has made it clear that it favors a transition to PoS which, due to the long range attack, inherently doesn’t provide this (automated, in all cases) property. As such, why not just fully embrace the new “make it as expensive as possible for attackers if we ever need social recovery” philosophy?