The endless tube debate. Frankly, tables sound better and it is objective, not subjective.
The problem is with the physics equations and what is defined as "distortion". What is defined as "distortion" by physicists is actually positive sound quality, esp, in the lower harmonics. This "distortion" is what provides the warm, rich sound of tubes.
I still remember when I was having my dad's classic tube system being rebuilt by Audio Classics. I was talking to the tech, an engineer who had retired from IBM. He commented on how solid state sounds better than tubes. He started talking about charts, graphs, and other stuff like that that proved he was right. Interestingly, he never mentioned one recording or piece of equipment--just graphs. I call this listening by equations. He was a great technician, but had no understanding of music.
Here is an article that actually explains this.
https://spectrum.ieee.org/the-cool-sound-of tubes
(Hopefully the link survives the security on this site.)
This shows how things labeled as "distortion" in tube equipment is misleading.
You have to trust your ears and listen.