Not killed off so much as delayed due to lack of ability to mass produce at a decent price point so far. It is far from scrapped. It was over hyped and optimist

Not killed off so much as delayed due to lack of ability to mass produce at a decent price point so far. It is far from scrapped. It was over hyped and optimistic to begin with. It just hit the reality that it has several decades of work to catch up on to be on the same page as current tech.