Actually Wendelstein 7-X stellarator prototype, which is the other reactor type aside the tokamak (which would be ITER), is performing better than expected. The stellarator has also some inherent advantages compared to the tokamak; for the tokamak the question on how to produce electric power 24/7 is still something which needs to be researched, for the stellarator this still has to been solved.
Aside that I won't bet on fusion power plants anyway, because so far all proposed designs (tokamak/stellarators) do require deuterium and tritium to function. According to Michael Dittmar, PhD in physics and lecturer on the institute for particle physics of the ETH Zürich, the world wide supply on tritium around 2025 should be around 27 kg. But to operate ITER for one year, you would need a supply of 200 kg; the half life of it is also only 12 years, so you cannot store it for long.
If you want to read this en detail, here's his paper:
https://arxiv.org/pdf/0911.2628.pdf - look at chapter 5.2