If people are arguing that the swashbuckler doesn't work for D&D because it's largely an invention of fiction and stage combat, I have some very bad news about wizards.
In any case, I'm frustrated that 2024 D&D not only didn't include the swashbuckler in the PHB, but overcorrected on how good of a weapon the rapier is and, as a result, made it harder to play bards and rogues as swashbuckling fighters at all. (If you go the more combat-oriented bard route, you're better off just going full skald with a long sword and chainmail.)
Swashbuckling types are a popular archetype, even if people like to argue about the details, and taking the Dragon #301 approach, and making it as widely available as possible for those who want it seems like the right thing to do, barring a single swashbuckler class with its own more specific subclasses.