1) I think we all know that if you ask why clipless is better, 99% of people will incorrectly claim "it helps you pull up on the pedals, and that gives you moar powar."
2) I haven't seen any data that shows that foot/pedal position improves power output. (Though it can minimize or produce injury.)
3) I can't think of a single reason why you can get a better foot/pedal position based on using platforms, clips or clipless. E.g. going clipless won't prevent you from dropping your heel on the downstroke.

The only thing I can imagine is that at high power outputs combined with high cadences, it'd be difficult (perhaps impossible) to actually keep your foot on the pedal. I'd fully accept that a sprinter who generates 1200+ watts really needs to be attached to the pedals. In which case, it's useful for racers and very fast club rides, and unnecessary for everyone else.

Plus, I'm not that hard to convince. Just show me the data.


Clipless can also generate hot spots, and if the cleat is in the wrong spot you're going to have lots of issues. You also don't need a lot of float -- 4º should be plenty. I'd say this is a wash.