New info . <| sep |> would take tremendous coordinationWe have seen it before , when miners orphaned the buffer overflow block and the invalid BDB lock limit block . If it becomes clear that Bitcoin is under a severe valuedamaging political attack , it can happen . Yes , I remember the BDB bug , and I agree that quick coordination happens if Bitcoin is damaged . Unfortunately , I don ' t think miners care enough to push this further if 95 % doesn ' t happen . It would require Bitcoin Core to release the plan for them , which I don ' t see ever happening . I don ' t think they ' ll compromise on lowering 95 % to 51 %, and that ' s a good thing . some kind of selfcompiled 0 . 13 . 1 versionIt is an extremely simple patch . True . It would still require them to change it , which is not their expertise . EDIT All other nonmining full nodes will not understand and validate until 95 % anyways , I consider it very dangerous if only mining nodes validate . Right after the segwitblockers would have been orphaned , there would be 100 % signaling segwit , so regular unpatched 0 . 13 . 1 nodes would see it as activated and would be able to use segwit transactions safely . Perhaps I ' m wrong here but , for the 95 % nodes , the nonsegwit chain would still be valid . To orphan the nonsegwit chain out , AFAIK it would require the Segwit chain to be longer than the nonsegwit chain , which would be very uncertain as the Segwit chain only have 51 % support . This made me realize a 51 % softfork is actually more dangerous than I first thought .