@JohnWSheldon most have some form of advancement.
Cortex, e.g. Firefly, is fairly flat, as most advancements just give additional options, but options themselves are very neutral, e.g. "upgrade X for the scene by downgrading Y". A lot of advancement is the same, e.g. increase stat A by decreasing B.. Past experience can grant bonuses, but it is limited.
Pendragon spans multiple generations, and while characters advance, when they die their young child takes over (kind of a reset).
Polaris: Chivalric Tragedy at Utmost North has two pairs of attributes: Ice & Fire, and Zeal & Weariness. As you gain experience Ice/Fire goes up and Zeal goes down (or Weariness, a negative, goes up). Usage varies during game, but a roll of Ice+Zeal might start at 1+4, but then after level up be 2+3. Transformation rather than advancement.