I agree with Charles and Grannyring, theory notwithstanding, I have found that I like the sound of active linestages in my system. Moreover, I like tube linestages even though they measure poorly compared to solid state, and I currently use and like one that is fully transformer coupled (transformers on inputs, output transformer feeding input transform on the power amp) even though transformers are both "unnecessary" and have inferior performance characteristics.
If there is a disconnect between theoretical ideals and what I hear and prefer, I disregard the theory. That comes from a LONG list of experience with design "breakthroughs" in not just audio--not all of them are as claimed.
"In theory there is no difference between theory and practice. In practice, there is." Yogi Berra.