Solo: A Star Wars Story may have treated L3-37's droid activism as a joke, but she was right about the way droids are treated in Star Wars. Droids occupy an interesting role in the stories, showing their capacity for emotion, learning, and self-improvement, with characters like K-2SO in Star Wars: Rogue One and C-3PO in Star Wars: The Rise of Skywalker providing some of the most memorable and emotional moments in the movie saga. At the same time, droids are very often treated the same way as any other machine, being bought, traded, or abandoned. With droids treated like disposable objects, it's easy to sympathize with L3-37's opinions.
The theme of freedom is central to Solo. L3-37's beliefs tie into this, even though they're not treated with the same gravity as that afforded to her biological counterparts — a fact which would frustrate her deeply. Her personal goal is quite obviously to be free and remain that way, reinforcing the movie's core message. The question is left open, however, as to whether becoming part of the Millennium Falcon at her story's conclusion is a fitting end for her character. On the one hand, becoming a starship and traveling across the galaxy could be seen as the ultimate expression of freedom. On the other hand, only ever being able to do as instructed and go only to the places you're told to seems like the very definition of servitude. Viewed in the latter light, many have criticized L3-37's fate as not only horrifying for her personally, but as contrary to the movie's core idea.
Related: Star Wars: Why The Republic Used Clones Instead Of Droids
L3-37 inadvertently raises questions about Star Wars more generally. If droids have the capacity to become fully sentient, it's worth examining
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