The paper is paywalled. Is it freely available anywhere? edit arxiv's preprint: https://arxiv.org/pdf/2001.02479.pdf https://arxiv.org/pdf/2001.02479.pdf Also,

The paper is paywalled. Is it freely available anywhere? edit arxiv's preprint: https://arxiv.org/pdf/2001.02479.pdf https://arxiv.org/pdf/2001.02479.pdf Also, off-topic: it's annoying that acm.org has now added a horizontal progress bar, similar to QuantaMagazine.org. I already know how far through the article I am, my browser shows me a scrollbar.