yeah, pretty much. Having all of the Material Info/Object info stored in the multimatteID/objectID pass so that the compositors can adjust as required when required. Spitting out individual MMREs for 200+ materials is a significant drop in speed / gain in filesize/layers when they can be generated automatically in post when required easily. The results used in combination with DeepEXRs are alot cleaner also, given that the alpha & ID values are stored per deep sample.