The dump of english wikipedia is 26gb compressed and completely usable with that compressed format plus a small index file.

That's small enough to live on most people's phones. It's small enough to be a single BluRay. Maybe Wikipedia should fund some mass printings.

What you do not get however is any media. No sounds, images, videos, drawings, examples, 3D artifacts, etc etc etc. This is a huge loss on many many many topics.