DPoS systems are designed to handle huge volumes of blockchain transactions, whether or not they involve smart contracts.
Yet, the majority of blockchains that deal with money transmission choose to employ PoW since it is still thought to be the most secure consensus algorithm.
Also, unlike PoW, where block creation is competition-based, DPoS is predetermined. In fact, if you are a witness, you’ll appreciate knowing that each witness has a chance to produce a block and collect prizes.
The bottom line is that DPoS is superior to PoW and even PoS in some areas. Stakeholder voting provides a superior performance in terms of transactions per second and serves to motivate honest and effective delegates.