this post was submitted on 01 Dec 2023
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The ITER was basically supposed to have been built starting in the 80s from my understanding... Until cheap fossil fuels dried up all interest in funding fusion research. When it takes 40 years to fund a single project via international collaboration, 50 years is a short timescale.
Even with renewed recent interest, fusion still has less than half the funding it did during the energy crisis. Of course the predictions from that era were optimistic given they were no longer able to do experiments like these when they expected them to proliferate.
The biggest delays for ITER were all political in deciding where it would be built and who would contribute what. Yes, there's been some technical delays since then, but compared to other projects of this scale it has actually gone fairly well.
The DEMO units to follow ITER should be able to be built by individual nations. Those should go a lot faster and hence cheaper. The whole point of structuring ITER the way they did was to give all the contributing countries experience in every critical system. That's very inefficient for this particular project, but should make follow up projects a lot more feasible.