The problem with “not real yet” is that it applies equally to things that eventually became real, and to things that never came to pass. We once said the same about both fission power and flying cars, and yet I still drive on the ground to get my groceries.
There does seem to be some movement in fusion technology, but it has also been in the “soon” state for decades now. There is no obvious way to balance these two contending data points
Not feasible, too expensive, doesnt work.
And yet here we are.