I ride with toe clips but I do not have them cinched tight, but with the ridges on the pedal and where my shoe's toe box are in the clips, I'm don't think my foot rotates/floats much. I would think if I did use clipless with float, my foot wouldn't be any more restricted, or at least to any more significant amount. Now, if you mean by platform pedals that you have no toeclips or(and) a true flat surface, then you could have a lot more float, and/or slippage on the pedal. I don't think you need to be a "racer boy" to want to use clipless. I'm actually considering going clipless as the compression of the toe clip, I believe, is contributing to my toe issues.