Comment by latexr

Indeed, or a PDF. When one study these topics is way easier to do so via PDFs for example: you bookmark the page and continue tomorrow. If it’s HTML, you need to bookmark too, but this is a hassle since bookmarking creates an entry in your browser bookmarks (that you need to clean up later) and if the html page is too long and has no anchors, good luck remembering what part you read last (not to mention that one can read a pdf offline and the pdf can be archived easily). Also knowing how many pages there are to read and how many you have read so far is very helpful (in contrast, reading a website is rather tiring since you don’t know how far are you or how much is left)