Some of us have no interest in 4k. No 4k TV’s, no 4k player. I still watch DVD’s quite often. I’m watching an upscale of the EU broadcast (widescreen SD) of the 97 SE TESB as I type.
The way I see it, if the 18 disc blu-ray set has the same special feature discs as the 4k 27 disk set, that the blu-ray versions of the films are going to identical. So either all the discs in all the sets are the 2011 version or they are all the 2019 version. And as the last BR release came BEFORE the D+ version premiered, I think it is safe to assume that the new BR’s are all the new D+ version. Though I am not getting a copy (mostly for financial reasons) right away so It would be good to hear if that is truly the case before I spend the money for something I don’t need. And they are also available on DVD, just no special features.