Some bands are the sum of their parts and nothing more: the individual musicians need to feed off each other to achieve good music. They need that chemistry of the players. Other bands are the opposite, featuring great solo musicians that don’t play well with others. Those bands don’t usually last long, as the music doesn’t gel or interpersonal conflicts cause the band to splinter.
It’s a rare band that achieves both ends of this spectrum, and Fleetwood Mac is one group who has somehow found a way to thrive artistically as a band while also spawning a plethora of creative solo works. (Granted, of course, that many of those solo works came from artists who left the band due to conflict.)