Text is much more searchable. Any binary format is ultimately text. We use it for non-input, non-human-readable formats. Graphs are great for showing relatio

Text is much more searchable. Any binary format is ultimately text. We use it for non-input, non-human-readable formats. Graphs are great for showing relationships and high level information at a glance. Human can recognize visual shapes (this can apply to text as well but text as well. Many editors now show text minimaps). But after a certain scale, the best we have for relationships is probably hypertext links and other uri references.