alt Hacker NewsMarcia Lucas along with two other editors won the Film Editing Oscar for Star Wars/ANH/Ep. 4 ( https://www.youtube.com/watch?v=w1dW6bNBzN8&t=52s ): she was no doubt a very good editor. Neither she nor the other two "saved Star Wars in the edit" in the manner often claimed. For example, Marcia Lucas fought to keep the teen-movie version of the opening with Luke meeting Biggs and others at Tosche Station in Tatooine, while George Lucas had always preferred to begin the Tatooine segment with the droids https://www.youtube.com/watch?v=olqVGz6mOVE&t=1407s .
There’s no way to know one way or another whether her editing “saved” it. There’s no other original edit without her, so it’s an unfalsifiable claim.
I was just responding to the poster claiming it was some sort of feminist conspiracy theory to claim that she was an editor on the film and did a good job. She did edit the film, and a plurality of her peers thought the editing was a good enough job to award the most prestigious award in the industry for the work.