For a tour pro doing 200k a day, the efficiency of the shifting may gain him a tiny amount of energy and time, at that level tiny amounts matter.
For a fat banker doing 1 lap of richmond on a sunday, the only difference will be he will feel even more of a loser when a 65 year old bloke wearing 80s club kit passes him on the hills and still has enough energy left for a cheery "good morning"
For a tour pro doing 200k a day, the efficiency of the shifting may gain him a tiny amount of energy and time, at that level tiny amounts matter.
For a fat banker doing 1 lap of richmond on a sunday, the only difference will be he will feel even more of a loser when a 65 year old bloke wearing 80s club kit passes him on the hills and still has enough energy left for a cheery "good morning"