To be faire, fusion plants lag on because either they are designed by people without enough resources, or by complex red-tape inducing collaboration. ITER hope

To be faire, fusion plants lag on because either they are designed by people without enough resources, or by complex red-tape inducing collaboration. ITER hoped to be done in 10 years starting in 2006, but they could only start in 2010 because every country wanted it to be built somewhere different. Then, poor cooperation from Domestic Agencies caused frequent changes that were merged without hierarchical validation, causing the need for a full-time team whose only job was to detect inconsistencies post-hoc. Therefore, the planned completion in 2020 was pushed to 2025. As a result, certain countries like the US made themselves begged to keep their promised investment. See this analysis: https://www.newyorker.com/magazine/2014/03/03/a-star-in-a-bottle https://www.newyorker.com/magazine/2014/03/03/a-star-in-a-bo... I don't see how those reasons would apply to memristor, though: development is controlled by a single company, and that company has resources.