https://www.stereophile.com/images/1220PS1200fig03.jpg
Really! Wake up and smell the roses!!! and stop your shilling!
For one it was done at very low power, would be much worse at normal power
Yet even at very low power anyone can see it’s distortion rising markedly from 1khz! up, and then much sharper after 2 to 3khz!!! to a cliff face at 5khz and up!! https://ibb.co/6rfG2ts
Here is the distortion from a good linear amp. https://ibb.co/8rTdp3D