Did anyone say that?

If not, then I will say. I think in the future there will be no more miners as we know this concept today, provided Bitcoin will still be sticking around, of course. Miners are a dead-end and if Bitcoin continues to develop as it does today, we will most certainly switch over to something else. I don't know what it will be but it will be better than POW and POS while still preserving the decentralized nature of Bitcoin, i.e. something which we all value and honor. And no, POW is not something which makes Bitcoin, it is its decentralized nature