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@jwildeboer That's a really interesting question! This is actually a measurable quantity -- mean path length between nodes in the graph. It's the famous "six degrees of separation" metric. Meta showed a mean path of ~4.5 hops on their network in 2016:

https://research.facebook.com/blog/2016/2/three-and-a-half-degrees-of-separation/

I have no idea what it is today, or what it is on the Fediverse -- I think it would be a really interesting calculation to do!