The zero stage of Ethereum 2.0 is approaching the final stage of testing with the connection of the Parity Shasper client to the public Sapphire testnet, writes The Block. According to Preston Van Lun, CEO of Prysmatic Labs, before that there was no public test network with multiple client support. Nevertheless, the team is actively preparing, and users can expect the launch of the Eth 2.0 core network in early 2020.
Sapphire was launched in June as the third Eth 2.0 single-client test network. In September, Prysmatic Labs, behind Sapphire's development, showed a test network with multiple clients in a limited access mode, allowing a fixed number of validators to connect to it.