Nick Szabo  🔑

I don't know. @udiWertheimer recently told me that he expects 24h reorgs to happen in the future and he seems fine with that idea.

I agree with Udi. But we are talking about today. The probability that even a one-day reorg would be accepted is near zero based on all we know, and for 4-5 days it's definitely zero.https://twitter.com/hasufl/status/1169972336457637888?s=20 …

Re-org depends on perspective no? Under "code is law" Bitcoin nodes are expected to follow the chain with the most work, even if the longer chain appears after a day. Anything else would be an active act of social governance.

Correct, we are talking about social intervention here. When should we use, how fast can we use it, etc.

You are treading in dangerous waters @Hasu In practice I think you're right that some form of community governance will happen in that situation if the situation is catastrophic and a large enough percentage of the community is affected.

It won't be framed as such though - there will be one group shouting "consensus is decided by nodes/users so it's OK to re-org using a snapshot" and another group shouting "Nakamoto consensus is king" plus a contentious fork.

What about immutability? All this years preaching the dogma and now let's use social consensus to decide what chain we like?

Radical immutability serves no purpose. Bitcoin is a tool made by humans to serve humans. If it stops being useless, we need to be able to change it (and we are - we can always move to an identical copy without e.g. a bug)