finality is the most abused word in blockchain. our research team just dropped a very relevant series on this. core thesis: finality is not a boolean. it's a spectrum of credible commitments. the only honest question is — under what assumptions, and at what cost will it break? almost nobody waits for Ethereum's formal finality (~18 min). rollups claim 5-second finality but at that point you're trusting a sequencer and a security council of ~12 entities. not the full validator set. no general-purpose rollup has reached Stage 2. not one. things people get wrong: more stake = more security. not if 3 entities control it. $50B across 3 validators is easier to corrupt than $10B across 50 independent operators. instant finality = real finality. a 200ms commitment from 1 validator is instant and weak. 400ms from 40 validators with 2 rounds of voting is slightly slower and categorically stronger. faster = better. a system that hits 150ms by relaxing fault tolerance from 33% to 20% has made finality faster and weaker. this is why we built Sei the way we did, and why we're designing Sei Giga using the same framework. 400ms finality under classical BFT assumptions studied for decades = credibly fast. read the series below.

first part:

second part: