Have you actually read the bluepaper on it? Its really quite a different system. I think the idea was wrong and wouldn't actually work. But the assertion that

Have you actually read the bluepaper on it? Its really quite a different system. I think the idea was wrong and wouldn't actually work. But the assertion that its simply exactly the same isn't the case. That said, even if an idea is old, that doesn't mean a new take isn't warranted. They considered rocket re-usability in the 1960 and tried in the 1970. EV are 100+ years old.