Doesn't it all depend ... on ... lots of things, always?
It goes against my instincts and experience to assume though that there is only one way (tubes) to make tasty audio soup and do the harmonic balance plus all the rest well.
After all, we sent men to the moon years ago. Surely engineers know how to properly apply transistors in SS amplifiers by now as well, especially in the digital age (whoops I used the D word), for those who seek good sound via transistors and not tubes.
Yes, you'd think, but guess what? There is not a lot of engineering talent being applied to the field right now. We've not been to the moon in a long time :)- back then they certainly *did not* know how...