Ethereum has a proof of stake chain in production right now, in the sense that it is running with over a billion dollars worth of real ETH. But it won't run use

Ethereum has a proof of stake chain in production right now, in the sense that it is running with over a billion dollars worth of real ETH. But it won't run user transactions and contracts until the EVM migrates over, probably late 2021, and that's when PoW will go away.