You know, I see this question a lot, and I think people sometimes miss the forest for the trees. It's not just about a power checklist, where characters just tick off boxes on their way to godhood. For me, the best use of cultivation stages is as a storytelling tool that forces change. Early stages are all about hunger—scrambling for resources, that desperate need to prove yourself in a brutal world. You get stories about struggling disciples, backstabbing over a single spirit herb, that kind of thing.
But the real character meat is often in the mid-tier bottlenecks. That's when ambition crashes into reality. A character stuck at the Golden Core stage for centuries? That's a recipe for existential crisis, for bitterness, for making terrible pacts. It mirrors how in real life, talent can only get you so far before you hit a wall of your own making. The stage system externalizes that internal struggle.
Later stages, like becoming an Immortal Emperor or whatever, they're less about the character and more about their role in the world. They start shaping laws, founding sects, becoming forces of nature. The personal growth shifts from 'who am I' to 'what is my legacy.' I've read series where the protagonist becomes almost alien after ascending too far, losing their humanity, and that can be a fascinating, if tragic, exploration of power's cost. Honestly, sometimes the most interesting characters are the ones who get stuck.