Right now Ethereum has 9 million ETH deposited on its proof-of-stake network, worth about $30 billion. That's running in parallel to the main network, which is

Right now Ethereum has 9 million ETH deposited on its proof-of-stake network, worth about $30 billion. That's running in parallel to the main network, which is still mining. Code to merge the two and eliminate mining is currently running on a public test network. Previous upgrades have all taken less than a year to go live after the launch of their public test networks.