Fangs back on.
That's simply not true. 99% of the DACs in use are solid state and I don't see their owners crying that they can only listen to them in short intervals. And as I said, almost all production of music is done with solid state. So if your assessment is true, it is yours and yours alone.
Fortunately we can easily show that your assessment is not what you say either. All we have to do is remove the knowledge of what you are listening to and all of your observations about sound of solid state and tube will disappear. If your observations are that fleeting, then what is their value again?
Unfortunately this is more improper audio evaluations leading to faulty conclusions. Please come back when you do your long term listening without knowing what is being played and then we can talk. Until then, you have formed prejudices that you now overlay on sounds you hear. And your brain equates that with reality with ease. You are simply showing what is wrong with improper evaluation of audio when you let extraneous factors enter the equation than just the sound going into your ears. How else your subjective reports could be so different than 99% of the world out there to say nothing of objective evaluation of audio?