As long as this is now an "innovation of CVTs for bikes" thread, I think it's key to point out that the conventional 1x12 drive train is roughly constant efficiency in all gears, slight worse for cross-chaining, and slight worse for smaller cogs due to increased internal friction in the chain links bending around small cogs. There's data for this kind of thing online. When we are talking about gearboxes with and without CVTs, we still have to pay most of the efficiency loss that a conventional drivetrain sees, since we still need a belt or chain to reach from...