I don’t tour in remote areas, so spare brakes or replacement parts are not a major concern. I use hydraulic disc brakes only and have for the past decade or longer. In all that time, I’ve never had a single issue with disc brakes. I remove the rotors when flying with my bike to prevent any damage. There are so many other things that have broken, spokes, saddle, pump, to name a few. Disc brakes are very reliable and trouble free. And they work better than other types.