Since Ethereum 2.0 is likely to take a few more years to begin increasing the throughput of the network, community focus is centering on layer-two solutions that could take some of the burden in the short-term.
Several solutions that support token transfers are already implemented live, including Matter Labs’ ZkSync and OMG Network’s Plasma. But the “holy grail” of layer two is generalized smart contract support, which would let DApps and DeFi move out of the increasingly costly blockchain. Both Plasma and ZK Rollups are traditionally considered to be lacking in that aspect, which is why community enthusiasm largely shifted in 2019 to the upcoming Optimistic Rollups, which would feature their own virtual machine with a generalized smart contract environment.