It's lovely for the bees, deer, groundhogs and if you have any chickensfree ranging. It should also choke out any weeds to leave you a path that is pretty uniform and green all spring, summer and fall.
I wonder if there is a nutrient accumulation/exchange advantage to having green pathways made of clover, dandelion and other nutrient accumulating ground covers. I think I saw 'skeeter' in one of paul's videos say that he leaves weeds in his pathways to feed the soil. I would think that the mycelium would then be able to ferry those extra nutrients from the pathways around to garden plants. Of course I could imagine some super high traffic paths would be better off mulched with whatever brown organic stuff is available.