Linear tracking arms are in theory superior to radial arms. However the general issue I have seen with radial arms is that the sheer amount of stylus energy vibration
dumped into a tonearm is very difficult to damp without a reasonable amount of mass and a fixed pivot point. Add to that yet another point of movement and you basically have turned whats akin to a 2 body physics problem with platter revolution and a radial tonearm pivot into a 3 body problem with platter revolution, vertical pivot and horizontal air bearing. I'm sure it can be solved but likely at twice the price of a close approximation in radial arm.
dumped into a tonearm is very difficult to damp without a reasonable amount of mass and a fixed pivot point. Add to that yet another point of movement and you basically have turned whats akin to a 2 body physics problem with platter revolution and a radial tonearm pivot into a 3 body problem with platter revolution, vertical pivot and horizontal air bearing. I'm sure it can be solved but likely at twice the price of a close approximation in radial arm.