[rkangel]

While the Wendelstein is incredibly impressive (and my personal bet for the path that will produce the first commercially viable fusion plants), it is not a fusion reactor. Or at least not yet. They have produced a plasma for a very short burst, but that's about it.

[DennisP]

That's a bit like saying an automobile is not yet an automobile, because you haven't yet put gasoline in it. Wendelstein will fuse deuterium. (It won't produce net power, but we still call it a fusion reactor if it fuses atoms.)

[rkangel]

I'm saying that calling an automobile a successful automobile before you have even put gasoline in it is premature.

The Wendelstein has so far been successful, and will likely perform fusion soon, but as yet it isn't a successful fusion reactor.