Just to clarify that a bit, PoS is running in production right now with 100K validators and $5 billion staked, with four independent client implementations. But

Just to clarify that a bit, PoS is running in production right now with 100K validators and $5 billion staked, with four independent client implementations. But for now it's running in parallel with the old chain, which might not merge in until next year. In the meantime, lots of layer-2 stuff is getting rolled out this year.