I wonder how quickly a pro team mechanic can change a wheel with disc brakes and through axles? There is some talk that the pro teams will simply change bikes instead of changing wheels. But with nine riders on a team, and a pro team car's roof rack only carrying about 7 or 8 bikes, and riders being of all different sizes and fits, that might not wok so well.
I've been wrong before, but I doubt we'll encounter that problem very soon. Bike racers are more interested in going fast. The only thing brakes do is slow you down. We'll see.
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My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.