Yes that's only useful under the original assumption of the article: that a state level actor must use a nontrivial part of its budget to factor one prime. The back of the envelope calculations if they did classical factorization is that one or a few 1024bit primes were possible but 100 were not. Of course next year they will have twice the CPU time, or a better quantum computer, so it's a short term win.
My laptop takes around 2 minutes to get a pair of 4k bits primes for DH parameters.
The problem is that people want their installers to be instantaneous. Those 2 minutes are too long.