Discs are superior in wet weather as well. Heat dispersion is probably the main advantage, so brake fade isn't as much of an issue.

As far as physics is concerned, spin a bicycle tire really fast...which stops it faster, pushing your hand against the tread, or clamping your hand on each side of the rim?

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car