

Some companies are still trying.
I’ve got a ulefone 27T. It’s the phone equivalent of a tank. It also includes thermal and night vision, and underwater video modes. I would also give it good odds of surviving being used as a self defence weapon.
Downside is it’s a relatively unknown Chinese brand.
I saw a talk on the subject about a year back. It was discussing tokamak reactors, from an engineer working on them. The small ones can’t sustain a break even state, but they are affected by the inverse square law to a larger degree. I believe China is about to start/has started construction on a power station sized test reactor.
The pellet sort are a different type. They have different pros and cons.