This is a large part of why (at least in the deep learning field, which I'm more familiar with) scientific publishing takes place more or less exclusively through ArXiv, because the field has been moving fast enough that while peer-reviewed papers are also published, by the time they come out they're long obsolete.
(Largely forgoing peer review as a scientific field is, however, not without problems. To say the least.)
It took us a long time (too long!) to construct that manuscript. Like SciPy itself, it was written primarily in the spare time of contributors with full time jobs. Glad to see it out there, though!
(Largely forgoing peer review as a scientific field is, however, not without problems. To say the least.)