TL;DR: Best-hope ingredients for consensus seem to be: witness discount for non-segwit txs, gradual weight increase by 14–17% pa, 12-18 month deployment period, hardFork nVersion bit, spoonnet coinbase refinements, 1-way replay protection.The Consensus Path To A Bitcoin Hard Fork: Part 15286Rusty RussellRusty RussellFollowAug 25, 2017 · 1 min readInstead of “1-way” this should say “opt-in”.