Do note:
There is no actual evidence of the chain of events being theorised in this article ever taking place.
Sure, it is hypothetically possible that the NSA could do this, however, there is no real drive from the authorities side ("deep state" theories aside...) to "unmask" Satoshi.
Spending millions of dollars in compute time to find some guy simply is not a priority for the NSA, when they have actual foreign intelligence collection jobs to be doing, etc.
RE: How the NSA identified Satoshi Nakamoto