Most of the taildraggers I've flown have had a spring connection to the rudder from the tail wheel. The Chippy has a free-castoring tail wheel, yet I haven't noticed it more prone to groundlooping than those others.
In fact, it is (for me) a much more preferable set up as it allows unrestricted turns when taxying. 360 degree circles around either mainwheel are fun! And swapping from rotations around the left wheel to rotations around the right at a precise point are a good excercise in anticipation of rudder input for taxying. And as my first checkout instructor back in 1979 said "if you can taxy this aeroplane competently, you can fly it".
Free castoring tail wheel also makes pushing the aeroplane into and out of the hangar a heck of a lot easier.