There is a whole generation of people who only know the Special editions though. So they know no different unless they went out of their way to obtain the original releases.

Basically Disney cannot make any money from releasing a 4K or 8K special edition release because still most people cant afford the TV sets or have space.

The only moderate plausibly option of a money making re-issue is the Original theatrical releases.

Then the Cinema angle is re-vamped versions of THe OT with 3d bums on seats tickets with a release later.

Pile on the new films also which are priority where as the OT is interim projects for later.

Sure they can Package episode 7 with the 6 others but who is really going out to buy that? if they are a pre-existing fan... And with knowledge of the next 2 films also.