Exactly, which is why mix room acoustics are so important, otherwise those same issues you mentioned about recording of comb filtering , phase cancellation and basically indirect sound waves bouncing around and cancelling or reinforcing the direct sound can totally mislead you. There can be peaks and nulls of 15 - 20db in a typical small room but many people spend £££s on the latest gear & software without being willing to invest time & money addressing the far less sexy room issues.Len911 wrote: It's the translation of audio that we believe will sound well on most systems
Like I said YMMV depending on genre, if you make solo piano pieces with a high end VSTi then sure, it's not going to be a major deal breaker... but if you mix anything in the rock/pop/EDM genres with a full production sound then you need to know that what you're hearing is the best version of the truth or the mixes will be skewed.
As for recording, I've recorded in many things in many places from a 10 piece live band to mic'ing up an extraction fan for an ambient noise. I find for most instruments any unwanted reflections can be tamed cheaply and simply with a couple of duvets. The main caveat to this is recording live drums, something I am happy to avoid nowadays with these wonderful virtual kits.
Back to the OP though ! ....