When I was an undergrad doing research in a university lab, the director of the lab also consulted at a Nuclear Fusion company. I remember like it was yesterday him making a statement that commercial Nuclear Fusion was going to be a reality within 10 years. That was 1977. What happened? Lack of government funding? The technical problems were far more difficult to overcome than what people thought? Both? I have to admit I haven't kept up on the state of the technology, so I'm hoping someone would be willing to comment.