This is (was?) the advantage of a printed encyclopedia - one that I've never really been able to replicate scrolling wikipedia. I think it has more to do with the limitations and lack of linking than lack of information (each of these trees has a wikipedia article).

A wikipedia dive session is likely to get more and more specific into trees (attacked by twees!); an encyclopedia flip session is more likely to go across a wide variety of subjects.

In the age of LLMs, it wouldn't be hard to build a UI on top of a Wikipedia dump [1] that satisfied any particular idea of serendipitous flipping.

[1] https://en.wikipedia.org/wiki/Wikipedia:Database_download