Tube sound is not about warmth. It's about correct presentation.

I've been using tubes for so long I forget what a solid state amp sounds like. 

I used a good S.S. amplifier so long i forgot my two unsuccessful adventures in tube amplifiers...

Synergy matter more than prejudices...

Tubes sound better, (especially linear triode tubes) because they have less distortion than bipolar transistors or FETs. They might not have less distortion in circuit, but transistors need some kind of feedback and triode tubes do not. I also think the size of the device has something to do with it, I have noticed that larger tubes in preamps sound better to my ear than smaller devices, tubes included. This may have something to do with microphonics, the old globe style triodes sound better than coke bottle tubes of the same manufacturers.

That’s pushing it! I think you meant to say preferences. 

Prejudices are not knowledge...

Synergy matter more than prejudices...

I am not sure what one means about presentation. When I play my system, and I will use in this case, a fav recording of mine, A Tribute To Jack Johnson, the presentation is all about hearing the band members do their thing, the written composition by Miles, and the excitement and energy of the music, which my system allows, to completely engage me. No tubes anywhere. In fact, my latest listen was with my Jungson JA 99C, and the listening experience was glorious. I listen at least one hour a day, and no matter who I listen to, I am engaged. Without a question, a " stage " is presented, and I easily hear the acoustics of the space........, but WHAT is going on, on the stage, is what matters most to me. For my 50 plus years, this is what it has all been about....the musicianship. Try it, you might like it. Enjoy ! MrD.