A structure that's also a joke
Pulp Fiction's chronology is scrambled hard enough that a character shot dead in one segment is casually alive, joking about pancakes, in the next — and the film never explains itself, because the joke is that you don't need it explained. The nonlinear structure isn't a puzzle to be solved so much as a way of making the mundane and the violent sit right next to each other without warning, which is closer to how these characters actually experience their own lives than a straight timeline would allow.
Tarantino's real innovation here isn't the shuffled order, though that's what gets cited most. It's the dialogue — two hitmen debating fast food and foot massages on the way to a job, killers arguing theology mid-cleanup — treating small talk as the main event and the violence as the thing that interrupts it, rather than the reverse.
Redemption, played completely straight
Jules's arc — a hired killer who survives a freak near-miss and decides, without irony, that it's a sign he should walk away from the life — is the film's most sincere thread, and it's easy to undersell how strange that sincerity is inside a movie this cool and self-aware everywhere else. Samuel L. Jackson plays the shift from menace to genuine spiritual reckoning without a single wink to the camera, which is why it lands.
The parts that have aged less well
Some of the film's racial and sexual humor, treated as edgy provocation in 1994, plays considerably more uncomfortable three decades later, and it's worth naming rather than excusing — a handful of scenes rely on shock value that the film's craft elsewhere doesn't really need. It's a real cost, even if it doesn't undo the structural and performance achievements around it.
Mostly earns it. The structure and the dialogue rewired what a crime film could sound like; a few of its provocations were never worth the discomfort they still cause.