I fail to see how it does. The popularity of Arxiv is indeed a sign of a slow-functioning peer-review system, but it has its valid uses.
My criticism pertains to OP using Arxiv as a PDF host for course material irrelevant to Arxiv's userbase, i.e. expert researchers. It is already hard enough to find the quality manuscripts in Arxiv. Hence why Karpathy made Arxiv Sanity Preserver [1]. I would rather not have to drudge through pages of tutorial pdf's when searching "neural graph methods for NLP" for instance.
