When working with multichannel formats in film, it is absolutely key that your sense of space is consistent across channel formats.

Many reverbs will get more subtle, or almost seem to fade away, when going from 5.1 surround to stereo. This is not the case with the pristine reverbs of Film 6000 that appear equally vivid, realistic and crystal-clear whether in mono, stereo, 5.1, 7.1 or extreme multichannel formats like Auro and Dolby Atmos.