Respectfully, I do not agree. But I won't try to change your opinion.
For the sake of any beginners:
I agree that different rooms have Individuals have individual tastes for different sound qualities, and different rooms sound differently. Which makes it frustrating to recreate the same sound at a different location. However, If near-reproduction of the original source material is the objective, then DAC technology does make a difference. DAC technology, which is a combination of hardware and software, has made significant strides in the last 5-10 years.
I'd expect that multichannel calibration tech has evolved similarly, but I don't really gave any experience in the area, so that would just be and educated guest.
For the beginners- if you can, try things before you buy them.
It's your time and money, so get what works best for you.
For the more experienced- if you disagree substantively with anything I have said, then please start a new thread. The purpose here is to help a beginner who asked a legitimate question, rather that confuse them with audio arcana, of which there is a surfeit.