I will share with you when I use braided line and maybe it will help you, or possibly others. FinesseGenics basically covered the whys, so I’ll just give you personal experience.
I use braid on my spinning reels as I find its much easier to use as it doesn’t coil up, comes off of the spool very nicely which gives you much better casting, and it’s very sensitive because of the no stretch. I use 10lb - 20lb braid and then tie on a fluoro for most of my spinning applications like wacky rigging, shaky heads, weightless Texas rigs. However I won’t use the leader for top water baits that are to light to throw on a casting reel. If they are treble hook too water baits I set the drag a little looser so I don’t rip the hooks out of the bass’s mouth and I’ve found a lot of success in that - not everyone does but I have.
I personally use Fluorocarbon for basically everything but top water and I use a backing of mono for about half of my spools on casting. Just the cheapest 5-600yd spool of mono I can find that way I’m not spending or wasting money on the expensive Fluoro respooling line that didn’t even get used.