Listening for cold start rattle isn't "being obsessed with minutia." Being obsessed with minutia would be like comparing 5 different oils to find out which one had more calcium and magnesium by 3ppm and buying that one.Silly BITOG logic. Used cars all run differently and have no commonality. Justify it all you want but changing between different 0w20 oils is irrelevant in the real world.
Caring for your vehicle and being obsessed with minutia are different things.