Mono has been dethroned for mainline!
I use 30lb Power pro on my drift rod. Change it once a year, so I save lots of money, I can feel the lightest bite, the thin diameter cuts through the water better thus allow a more natural drift, while using less lead. When that bite does happen, all that is needed is a flick of the wrist to drive that hook home!
Oh and I NEVER break off massive amounts of braid into the river. I always break off my leader, and even some days I use the same swivle all day.
Mono for leaders, Braid for mainline