Anyone trying to put together the ultimate system knows that such a system does not exist. When having an obsession with musical reproduction, it is difficult to say this is it, but this is what some on this forum have been able to do. I've built my system over the last eight months after almost twenty years away from the hobby due to space and clutter issues as perceived by the boss. I started with the McIntosh MA12000 and Wilson Sabrina X. Neither are "the best", but both are worth building a system around. Everyone has differing demands for musical reproduction. Nobody in my family has ever had any interest in sitting down in my two channel room. Everyone is in the media room watching KDramas...guilty of that myself.
My sense of what I wanted in musical reproduction has changed radically over the last eight months. I now realize that many gear suggestions on this forum stem from a limited exposure to varied gear and environments and personal taste vary wildly. That said, there are some with a great deal of experience and keen ears. Some of these members have replied to this thread. I'm not in that category.
A personal response to your question is that my improvements in analog left me interested in improving the digital and then better digital drove me to improve my analog. So why did I do this? Improvements added a difficult to describe musicality to reproduction that I really appreciate when temperatures outside hit 110, or conversely 8 degrees. My digital and analog are now quite satisfying and much of this I attribute to cable selection. All of it I attribute to direction from members on this forum. Musicality to my streaming allows for a vast selection of material and analog provides what my film cameras provide. What is it? A routine, a need for great care and to some degree skill and a satisfaction when the end product meets expectation. Digital anything gives me variety and ease of access. All of this is personal and if you are happy where you are, consider it a gift.