Comment by nivertech

Nakamoto Consensus didn’t solved a secure scalable PBFT (Practical Byzantine Fault Tolerant) Consensus.

Bitcoin didn’t solved a forkability and finality problems. Blockchain (or more properly hashchain) is a linked list of hashpointers, and since anyone can create a hashpointer pointing to the head of the hashchain - it means anyone can fork it. And indeed Bitcoin was forked multiple times, and the solution to forks was almost always either centralized and/or social.

IMO PBFT consensus algos have a niche applications anyway, and not required for Electronic Cash implementation, only for decentralized and/or disintermediated Systems-of-Record, but that’s a complete opposite of bearer instruments like electronic cash.