timeline of progress in BFT protocols: > 1980-2012: BFT problem gets defined, feasibility of solving it established, impossibility results in BFT land are understood. > 2012 - 2014: understanding how bitcoin consensus relates to BFT. > 2015 - 2020: answering how make bitcoin faster by using traditional BFT consensus in proof-of-work world. > 2021 - 2025: improving communication complexity versus improving throughput, MEV protection/prevention, censorship-resistance