if the HTML is already to big then any picture would be insanely long
Data Hoarder
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
Yea, I don't get this "race to the impossibly worse format". There were (even multiple) posts about saving wikipedia to pdf, I mean what for? The result will be impossibly larger and harder to use in any way as far as finding the article you want and navigating around, plus the format itself is just bad without reflow for reading on anything else except precisely one device of a certain (display/window) size and resolution.
You could use the scrolling screenshot feature on Samsung phones or Edge browser.