The standard single column of content layout of nearly every webpage is a bad fit for scientific content because the information density is way too low. A pdf,

The standard single column of content layout of nearly every webpage is a bad fit for scientific content because the information density is way too low. A pdf, where I can display multiple pages, each with two columns, side-by-side is much better. This is really handy when you need to do something like refer to a figure/equation/table on the last page. I have yet to see any website solve this lack of density problem in any meaningful way. Of course, paper is still better, but I'll take a pdf over a web site any day. A pdf is also much easier to archive. The job of sci-hub would but a lot more difficult if every paper came with separate html, css, javascript, and images.