As I was measuring fields on my magnet stacks, I verified an interesting effect. Stacking more than three magnets did not result in a bigger field.

The slippery nature of magnetic fields, quantum mechanics, and plasma does not paint a promising picture for fusion energy on Earth. However, space has plenty of radiation, vacuum, low temperatures, and no gravity. So, you can build large structures such as accelerators, you don't need vacuum pumps, and you even get cryogenic temperatures on the shade side of your solar panels. Yes I'm using fusion as an excuse for space exploration.

One thing seems certain, the conventional earthbound brute force approach is wrong. Hydrogen Storage, cheap renewables, much more developed, profitable, and promising.