Frankly, the only beef I have with arXiv as is: its insistence on blocking AI access.

I had to tell my AI to set up an MCP for "fetch while bypassing arXiv's rate limit" so that it doesn't burn 40k tokens looking for workarounds every time it wants to look at a paper and gets hit with a "sorry, meatbags only" wall.

Very annoying, given how relevant arXiv papers are for ML specifically, and how many of papers there are. Can't "human flesh search" through all of them to pick the relevant ones for your work, and they just had to insist on making it harder for AIs to do it too.