I’ve noticed over the years of listening to music and researching the people behind it that regardless of what genre I listen to, many of the musicians involved have all played with each other at one time or another. I like finding out who actually played on an album or song or who wrote the material. It’s always the same people I find who work with each other. You find a lot of this in progressive rock music. Many of the groups had shifting lineups with many different people. Many times they help out out on solo projects for current or past members. The examples would be too numerous to mention here. There are a number of A list studio musicians who have tons of credits on many different albums. You could even do what the progressive rock group Yes did in 90’s and merge all the different lineups of their group since they started and have them play on one album. They even toured for the album too which is quite amazing. The end product had some interesting moments but really it fell apart. Too many egos and too much meddling from the record company ruined all that. I bet someone out there actually has created a family tree of different musicians and how they relate between different groups. Read the liner notes on some of the music you listen to and you might be surprised.