What is being removed is the Proof of Work mining (POW). The majority of the blocks are produced via Delegated Proof of Stake (DPOS) by the Witnesses.
Currently 1 out of every 21 blocks is produced with POW. The other 20 are produced via DPOS.
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Thanks. That actually helps me understand this, with the comments elsewhere here. So the witnesses get assigned a place line to create blocks. Will every block be produced by only one witness, then? If so, how do they ensure that the one witness produced the block correctly? In the video, being able to compare the hash for a block was an important part of ensuring that the chain has not been corrupted somehow. Thanks!
The way i understand it is that if a witness is unable to produce a valid block the next witness in line will do it.
Thanks. I do wonder how they are ensuring that each block is valid -- without relying on that one witness to say that it is. Maybe someone will post a nice video or graphic sometime. Learning about blockchain technology is one of the side-benefits of Steemit for me. A little at a time, lol! Thanks again! : )