there's lots of handwavy things. They even said they "discovered new physics" to explain some disappointing (perfectly predictable, by other established nuclear physicists) results. "Oh the physics equation was wrong, we just need to make everything 25% bigger".
Also, the emitted radiation levels will be insane once it's scaled up
very stupid. One of the most difficult things in space is cooling stuff. Sending up a bunch of space heaters in a box (almost all of the energy pumped into a computer is turned into heat. The actual computatiion takes next to nothing in comparison) is definitely not a good idea. Definitely not one thought up by a technical person.