I first became cognizant of polarity in the mid 60's with the Command Series of recordings on 35mm tape. I forget how or why.
For a long time, LPs were marked as to preferred polarity. They encompassed the full gamut of recorded music from Pop to Opera. Obviously some were marked
'??'IOW with effectively all multi-track recordings you can't hear absolute phase.
I'd agree on many and maybe almost all made from the computer era forward, but there are plenty of multitrack recordings from 1955 onward when the Ampex Sel-Sync 8-track was invented that while their polarity is inverted overall, it is consistent from track to track.
Now if you pay attention to those effect devices and compensate for their polarity (excepting phase shifters!), then you can make it happen.
When not working in a studio I knew to be polarity correct, SOP when using EQ, Limiter, etc. is to patch the track to a 2nd input, insert the device in the track and bring up the 2nd input. If the level increased, good to go. If not invert. Many mixing desks of the era included a Phase Correlation meter. It's a simple matter to use a mic of known polarity to check all the other mics in use. Of course, misteaks did happen ~<;-)
But you are one in a million when it comes to this sort of thing!
Many recording engineers I knew were every bit as concerned and delivered masters with correct polarity. Master Refs where checked to ensure the cutting house was polarity correct.