I actually did this pretty recently, in an attempt to get some magazine articles onto my Kobo e-book reader since Pocket couldn’t fetch the paywalled ones (I do pay).

I figured I could just save the page, automate a few edits to get around dynamic stuff, and then use it as, you know, an HTML document.

Even with a nice friendly mostly-text literary magazine, after about five hours I gave up and just copy-pasted the rendered text.