Hm, you are obviously not following what's going on in the fusion space currently. They are continuously churning forward towards a viable design.
What "renewables" (with which I suppose you mean solar, hydro and wind) have going against them is their environmental impact. Sure it's not as bad as fossil fuels, far from it, don't get me wrong. But the area and materials needed for solar, the animals getting disturbed by wind turbines (birds killed, wales confused, ...) and the ecosystems that get flodded by dams are not nothing. Especially in the light that the energy demands of 8bn+ people are continuing to grow, and those 8bn will soon be 9bn and 10bn.
The promise of fusion tech is that you get much more bang for the buck, and with "buck" I mean resource use. That's not going to happen soon though, so until they we'll be stuck with solar+wind+hydro, but those are not really sustainable solutions in the long run (i.e. 100s/1000s of years ahead).
Of course, if you see fusion just as some crazy idea and know nothing else about it, then I can see how your "prior" makes sense. But once you know the details, it's quite different, since fusion is also continuing to progress down its experience curve. Tokamaks and stellerators in particular.
What "renewables" (with which I suppose you mean solar, hydro and wind) have going against them is their environmental impact. Sure it's not as bad as fossil fuels, far from it, don't get me wrong. But the area and materials needed for solar, the animals getting disturbed by wind turbines (birds killed, wales confused, ...) and the ecosystems that get flodded by dams are not nothing. Especially in the light that the energy demands of 8bn+ people are continuing to grow, and those 8bn will soon be 9bn and 10bn.
The promise of fusion tech is that you get much more bang for the buck, and with "buck" I mean resource use. That's not going to happen soon though, so until they we'll be stuck with solar+wind+hydro, but those are not really sustainable solutions in the long run (i.e. 100s/1000s of years ahead).
Of course, if you see fusion just as some crazy idea and know nothing else about it, then I can see how your "prior" makes sense. But once you know the details, it's quite different, since fusion is also continuing to progress down its experience curve. Tokamaks and stellerators in particular.