Sure there could have ended up being a separate film released here and there, but this nine-part saga effectively gave audiences a beginning, middle and end.
George Lucas went back and forth on the idea of releasing a sequel Star Wars trilogy set after Return of the Jedi, and as we all know, eventually those plans fell by the wayside so he could make the prequel trilogy.
Disney ultimately didn’t use the story treatments and concepts that Lucas came up with, but evidently the company also feels it’s necessary to wrap things up on the Skywalker side of things.
But even if Lucas had returned to the Star Wars franchise and made his versions of Episode VII, VIII and IX like he was thinking of doing before the Disney purchase, there was never any intention of taking the main saga into the double digits.