FWIW (and this is sort of off-topic) I almost don’t see the point in doing an D+83. I think 4k83 is that good as a base scan. I’m sure if you did an A-B between 4k83 and the D+ version the difference would be clearer but honestly, watching 4k83 (especially the minimal DNR-no chroma noise) on a projector is an almost flawless movie-watching experience, especially as someone who definitely remembers seeing ROTJ theatrically a lot.

D+80 is probably the most “necessary” (as it were) because we’re apparently a pretty long way off from a high-quality 100% film-scan sourced restoration of the best Star Wars movie. (i.e. 4k80) so having a very good blend of the 2012 Lowry re-master and high-quality shots sourced from the 4k80 project should fill that bill almost perfectly. As it is, the version of D+80 right now, using the D+ streaming master, is 95% of the way there, there’s only a few little nits to pick (and the choice to leave a lot of the 1997 optical re-comps in isn’t one of those nits, for me personally).