Quote: "
when lucas was running star wars the dvd / blu ray releases had no extended editions like lord of the rings. "
True there wasn't massive extended editions like we know today, but there were multiple editions over the years that added them gradually.
In fact the film changed between cinema release and video release quite drastically.
The actual film that went out on the theatres originally is about 9 minutes shorter than the original video release, this actually happened about two weeks into the cinema runs and George made a statement about it saying "There will only be one. And it won't be what I would call the "rough cut", it'll be the "final cut". The other ones will be some sort of interesting artefact that people will look at and say, "There was an earlier draft of this."
So he always intended on updating and adding to the films. Which is evident in the fact that a while before they sold out to Disney Lucas actually had plans in the works to release a definitive star wars collection which would add a majority of the cut scenes in, effectively increasing the length of the films by 20 to 30 percent.
In 1997 to commemorate the 20yr anniversary Lucas went back to the original and completely digitally enhanced it, adding new effects and cg enhancements to existing shots as well as adding many new scenes.
It's actually famous for it becuae it was one of the first films at the time to get such a reatment, and there was a big controversy over whether adding the extra scenes would ruin it, there are whole sub-cultures of fans who argue the new scenes were good or bad till they're blue in the face.
An example of an extra scene in that edition was one where Han is in the hanger with the falcon and is approached by Jabba about paying his debt. Another is when Ben and Luke are approaching Eisley there's an additional minute or two of them gliding through the town showing off some local creatures that had not made it into the first release, also a scene between Luke and Biggs Darklighter just before the attack on the Death Star was inserted. This was a deleted scene from the 1977 film.
In the 2004 dvd release they also added some missing scenes, and reordered some existing ones to make the continuity better, as well as more digital re-mastering including additional Dolby and THX support.
Again in 2011 the Blu-ray edition was launched with further scenes and enhancements.
There's also been various directors cuts and special editions with extra scenes in the special features menu.
So yeah although it was only small additions each time, there have been multiple "extended" versions, and as I said before it was a controversy because it was one of the first to do this, so in a way Lucas set the trend for extended version :p