Comment by pfdietz

Now ask: what is the power density of their proposed reactor?

The predecessor, the ARC reactor in the 2014 paper, had a power density of 0.5 MW/m^3.

In comparison, a commercial PWR, which you can buy today, has a power density of 20 MW/m^3.

So, even with all the HTSC hype, their machine is still a factor of 40 worse than existing proven fission technology.

How is such a bloated, much more complex machine even going to compete with fission, never mind the alternatives that have sidelined new fission construction? The capex will be completely out of bounds.