The only valid argument to refuse adopting disc brakes probably stems from the steep cost if one already owns a bike with sub-optimally performing rimmers: new frame, new hubs/wheels, and (if installing hydro) new levers along with the calipers...can get pricey. But, buying a new build? It is borderline absurd to eschew a superior performing brake system, ESPECIALLY when their inclusion in the build is by now built in...both in terms of weight savings in other places, and costs.