Experiments like Wendelstein remind me that the only thing holding back fusion power is money for research like this. Every year, we spend billions on fossil fuel exploration because the return on investment is quick - just think about all the wells going in to extract shale oil. What if we collectively had the will to invest this much into fusion?
On top of what everybody else has said, I also don't think it's a given, even if/once we crack the technology, that anybody will actually use it to generate power. I think there's a totally plausible outcome where somebody builds a fusion reactor that produces more energy than it consumes and said reactor has essentially infinite, essentially free fuel, but the design they come up with costs $20 billion a pop to build (or whatever) with no clear path to making it cheaper, and just the cost of capital to build new plants makes those plants more expensive per unit of energy generated than coal/gas/solar/etc. even though the fuel costs nothing. At that point, even if it works, maybe the one demonstrator plant they end up building continues to tick away as a singular novelty and the rest of the world carries on building gas plants and solar.
Fission is already in not too different a place than that: fuel is nowhere near the dominant cost per unit of energy produced. I hope that ends up not being the case with fusion, but it's hard to predict at this point.