I used to take advantage of the browser's "work offline" functionality. This started to work less and less reliably, even by the early 2000s, but Wikipedia still worked nicely. I would dial up at night when everyone was asleep and click through to all the pages surrounding some topic, like internal combustion engines. Then the next day I'd work offline and digest it all. I was sad when I clicked a link that hadn't been cached, but somehow having only the limited amount available meant I actually did read it all. Nowadays it's all available and lots of people don't seem to read anything ever. Sigh...

There is an app for Android called Kiwix that lets you download the whole of Wikipedia for viewing offline. I keep meaning to do it but never got around to it, though.