Not this again, an overdesigned overcomplicated impractical mess. Something like Wikipedia would never be possible on a xanadu platform because it would be too complicated for anyone to contribute.

Xanadu is just not a realistic model for how collaborative text works in practice, the admin of tracing everything back to everything else would extinguish any useability

Between cookies and sites that track cursor activity, the Web does have backlinks. They're used for monetization, not for collaboration.

Git as used for large open-source projects is probably the closest thing to the Xanadu dream. There is collaboration, and tracking of who did what. Fortunately there is no monetized fractional ownership.

In retrospect, Xanadu's big problem was the lack of a business model.