Oh, this hobby of ours. I would venture to say that someone with unlimited funds can indulge their fancy for the ultimate in sound reproduction, clarity, reality, sound stage, imaging, etc, etc, regardless of price.
For everyone else, it comes down a matter of priorities and trade offs both financial and acoustical. If your room is optimally acoustically treated to begin with, then you’re more likely to maximize the sound quality of your given system. That being said, a resulting perceived upgrade in sound quality may be the result of expectation, confirmation bias or the placebo effect.
But, assuming that the improvement is in actuality real and valid, then the question becomes, is it worth it? If your looking for the Holy Grail of musical truth then yes, For others more value oriented, possibly not. At what point, do you say, no more, Basta?