Suspension forks typically have a bridge which connects the two lower legs. In the past, this also provided a hanger for the rim brakes. I always thought though that the main purpose was to ensure that the two legs remained parallel in compression, so that there was no torsion on the front axle.
I've noticed some MTB suspension forks that are bridgeless. In these systems what prevents the legs from compressing at different rates and twisting the axle? Can we broadly say a bridgeless suspension is weaker than a bridged one?