Now let's see what got hidden at the end of the article...
To come up with this miraculous result, they simply had to do was assume that we're just a few years away from a NINE HUNDRED PERCENT IMPROVEMENT IN ROCKET EFFICIENCY.
And all of this is before you even bring up the more banal problems like significantly increased latency and completely eliminating the capability to do hardware replacements or upgrades. Every piece of equipment in one of these things would just age in place. Get a batch of bad CPUs? Bye!