If you've come from an mtb bike, then disc brakes on roadie are the way to go.
My giant tcr has ultegra discs (like xt), beautiful on descents and when on hoods, you don't need much force to brake we all know the stopping force of discs compared to rim.
Pro Peleton, disc brakes were the next logical step due to carbon rims and braking; poor performance in wet and under heavy braking where rim heats up creating weakness in cf structure.
Main reservations in pro peleton were, weight, wheel change issues neutral support need both rim and disc, ninja calf slash from disc in crash, lycra too tight causing ball insecurity.
But really when you think about it road bikes have slowly borrowed mtb tech, thru axles, disc, internal cabling, even carbon compliance in frame. Also disc brakes bikes have meant new bike sales.
I used to think on old roadie with rim brakes if someone came out in front of me; I'd never stop the thing, now much better with discs, and from memory this year in the Tour disc brake bikes were on the podium.