I am so tired of hearing that anyone who listens to SET amplifiers "Must like distortion".
It must be comforting to be that simple.
The reality of the situation is a single ended tube amplifier is a very specific solution to a very specific problem.
The topology results in an implementation that has vanishingly low distortion at very low power levels.
This is a direct result of three factors,
Low distortion of the audio triodes used, the lack of multiple devices and the avoidance of the non-linear magnetic behavior around zero crossing.
FWIW, this only works in the tube world for very low power on very efficient speakers.
I still have memories of listening to a Klipsch horn with a Phase Linear 400. I could not stay in the room at any power level. It was near class B and arguably the worst amplifier ever made. Still, it took an efficient speaker to highlight its faults.