My tour this year was on a disc brake mountain bike, as it was an off road route. Hydraulic braking way easier on the hands, but I had some problems with pad rub which took time to sort out.

Hydraulic brake long term maintenance is not something I can do myself on the road; however it's gotten to the point where I think this is no longer an issue, even in developing countries. Likewise for thru-axle wheel replacement.