The Ethereum PoS chain is already active today and giving "staking" rewards. PoW is still active too but both chains are mining ETH at the moment and the plan is to switch to PoS only.
As the PoS did actually launch and is actually working, I'm not sure it's going to be "never".
They may be late like so many software projects, but they seem to be serious about the switch to proof of stake.
For those that don't know, staking is a dedicated computer + 32 ETH in escrow, then you get your ETH back + 1/2 ETH payment at the end of the month but fewer if you were offline including possibly losing some of your escrowed ETH.
So at what point do they throw the switch that invalidates millions of dollars of investment in mining Etherum? Or is it all transferrable? And who is the "they" that throws the switch?
As the PoS did actually launch and is actually working, I'm not sure it's going to be "never".
They may be late like so many software projects, but they seem to be serious about the switch to proof of stake.