Repair a puncture without removing the wheel
Is that their reasoning or yours?
Sort of a joke but nonetheless a valid benefit.
I imagine a marketing blurb somewhere will say something about it being stiffer/lighter/more aero. Atleast thats what the bloke at the Dear Susan stand at Bespoke said about his mtb with double 'rightie':
@spotter started 9 years ago
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Repair a puncture without removing the wheel