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It has been done before by Felt for the US team in 2016 Rio. Aerodynamics (and some claim of better handling due to weight more "inboard").
"The reason for this, according to Felt, is that bikes are faster when the airflow is coming from the drivetrain side, so as the air will always be coming from the left when riding anti-clockwise around a velodrome, it switch the drivetrain to that side."
Anyone noticed the Japanese sprint track bikes have the crankset on the left (rather than right) hand side. Interesting choice, and wonder why?