It has nothing to do with "not enough film fans out there." It has everything to do with the fact that a significant majority feel that the "updates and changes" aren't nearly as earth shattering as some make them to be. I mean, essentially, there are people out there that feel that the Special Editions are Star Wars...granted, updated but feel just the same with pretty much 90% of the changes and updates.....
And again, this is only a "rumor" right now. Technically, Lucasfilm has never once stated they were actually releasing a Saga Boxset....we just all assumed it was coming, considering the 30 Anniversary and the fact that the films, as one, have never been released....
"please someone tell me what's prevented LFL over all these years from remastering the OUT."
Because, he didn't want to. The Special Edition is closer to what he wanted all along, from the beginning. He feels this is what HE wants to see out there in the general public when it comes to Star Wars.
Also, this notion that Lucas won't or can't stop changing things is stupid. From '97 to '04, he didn't really change much at all. '97 was the year he changed and updated. '04 was the year he fixed the updates he made. I can pretty much guarantee that whenever the films are released again, the changes and updates will be very minimal compared to what he did in '97. It'll be fixing lightsaber colors, correcting matte lines, and another transfer. He'll do the most updating with the Prequels.
But Lucas' days of constantly redo the films is pretty much coming to an end....The scenario of what's going to be changed in this boxset has gotten way out of hand in the online community.