Immersive audio is NOT the same as immersive acoustic...
True dat, most receivers and processors use some type of DSP to help with the acoustics.
Immersiveness in PHYSICAL acoustic is created by passive material treatment and active mechanical control of the room...
Yep, I agree 100%.
In digital audio of home theater for music theater the main point is NOT PRESERVING the physical recorded experience of a specific non amplified musical instrument , which reflect the trade-off choices of the recording engineer IN A CLOSED ACOUSTIC SPACE , the main point with home theater music experience in is rrecreating the general atmosphere of AMPLIFIED instruments ...
This is where the room acoustics come into play. There is a blueray concert by Kraftwerk recorded in Atmos and 3D video. It is the most lifelike recording I have ever heard in my room when played at reference levels. I think because the amplified instruments are easier to reproduce (mainly synthesizers).
When I play back solo piano I like minimal use of height channels, more use of wide channels and room acoustics help recreate the sound of the hall or studio the piano was recorded in.