Exactly. There were many doubts about exactly how useful computers would be. But they were already proving their usefulness in some fields. The current state o

Exactly. There were many doubts about exactly how useful computers would be. But they were already proving their usefulness in some fields. The current state of quantum computers is so much worse than that. It's not just that they have produced zero useful results. It's that when these quantum computers do produce results on toy problems, the creators are having a very hard time even proving the results actually came from quantum effects.