The advantage of fluorocarbon is that it is nearly invisible when you put it in the water.
I use it for Trout and whitefish, mostly due to their incredible eyesight, and the Gin clear water that I fish for them.
When I am fishing in dark or stained water, I don't bother with the Fluorocarbon.
I'll leave it on my tip-ups as long as it is the pound test that I want for the fish I am after.
Some days, it does not matter what you use, other days it has made the difference.
I keep it around as another option to try, just in case things are slow.
Hope this helps,
Wiener