In this new day-and-age, many pilots are learning on the (in)famousHobbyZone SuperCub.
A 3-channel airplane with a steerable-tailwheel.

The dihedral will force rudder input to roll the aircraft, but the tailwheel remains on the right-stick?

I see no problems with teaching a student to program and use aileron-rudder mixing for coordinated turns.
So, long as the student knows that the mixing shouldn't be used as a crutch. It must be unlearned, eventually.

Same thing with automatic and manual-transmissions. Learn to drive both....</p>