I've probably spent as much time down paper encyclopedia rabbit holes as Wikipedia. Both have their pluses which can't be easily replicated in the other. Same for dictionaries.
Something that came up in a recent discussion on Encarta: I have a century old encyclopedia set - the fact it is not constantly updated makes it a fascinating piece of history. Sometimes with better - manual - shortcut ways of calculating that I never heard of in my schooling, and a glimpse of skills that have declined. Reading about steam engines while they were still cutting edge, etc. I've learnt all sorts of little bits of history none of the many history books I read and Wikipedia time I've spent have ever got near.
Having a snapshot is as useful, but differently useful, to having an always updated resource.