Now many new projects prefer to use PoS mining because it does not require so much electricity like PoW mining. Ethereum plans to comes to PoS mining.
Ethereum plans to change its consensus to POS to improve decentralization and throughput along with energy consumption. PoW makes a lot of sense when a network has lower valuations and there are no mining pools asics etc. With the current valuations it only makes sense because the community is confortable with it to secure the network.