Instead of PoS there are FBA (federated byzantine agreement) chains who are older than PoS thus better tested and arguably without any of the flaws PoS has. PoS

Instead of PoS there are FBA (federated byzantine agreement) chains who are older than PoS thus better tested and arguably without any of the flaws PoS has. PoS is really a step backward and not the real successor to PoW.