Insane. No. Mathematicians will not produce >2 "high SNR" papers per month as their rate calculated over any reasonable time scale; but their maximum per month? Very much the case that they will complete linked papers/dependencies/series of work/etc, spend a month in editing across multiple nearly-complete submissions, and so on.

And in mathematics, at least, priority on results is determined by the first time it appears out in the wild; for most, this is the arXiv.

Nobody is going to accept waiting a month on something that they fear may be scooped, costing them years of work and thought.

This affectively makes the arXiv obsolete for much of the purpose it has heretofore been put to.