Since my work is vaguely related to superconductors, I saw this comment and was excited to dig into all the errors in the article, but actually couldn't find any in the parts discussing the superconductors specifically. (I don't know data centers and can't comment on that bit.) 77 K is indeed an appropriate temperature for LN2 coolant for high-temperature superconductors like they're using. What errors did you see?
The very first sentence is confusing. "Power demands of data centers have grown from tens to 200 kilowatts in just a few years". I assume they're talking a single rack here, not "power demand of data centers".
