As to inverted polarity, I've written several times in these forums concerning recording polarities which can often be wrong, especially for multiple instruments. These can be heard in many Mercury Living Presence recordings of pop engineered by Stan Ricker who I had several conversations with. So, LPs can be way out of correct polarity. I have Brasil 66 LPs where the first issue is in correct polarity and the second pressing is in 180 degree wrong polarity.
Also, CDs and digital recordings are not usually in incorrect polarity unless they were recorded that way or remastered incorrectly. I have noticed some of my Heifetz/Piatagorsky CDs have reverse polarity on some tracks.
Overall, most of my recordings have good polarity (correct rather than reversed) and have strong imaging, just like high end fuses by SR have a correct and incorrect polarity.