To build on a discussion I had with an author concerned about pacing...
A typical arc I'd say might consist of :
- Opener: setting the scene, introducing characters, motivations, hinting at what's to come
- Committing: protagonist discovers something they can't ignore, but steps over the metaphorical threshold, commits to exploring / interacting with the main theme
- Core: all of the setup is out of the way, they're in the thick of the action, and it's all about their thoughts, feelings, and what's happening to them
- Deeper: immediate follow up to the core of the story, but more intense; they're no longer just playing, the protagonist isn't sure that they can make it through this intact
- Conclusion: they faced the full intensity of the action, and now have a chance to breathe again. Time to wrap up, or setup for the follow-up story
Sometimes really long multi-chapter stories get stuck in a place where they've delivered the core section of the story, but want to continue, chapter after chapter, with either more of the same, or enter into arms-race territory, where it's more intense, more complicated, more people, chapter after chapter, with no rest. But to tell a good story you've got to feel the cadence of your writing and know when to pile on, and when to ease off. You can carry on for a quite a while if you go through cycles of open/commit/core/deeper/conclude/core/deeper/conclude/etc. as long as it doesn't repeat itself and moves somewhere different with each core section. It's a real skill to know when to
stop, that you've mined out the characters and setting, or teased on the plot for as long as is credible, and to write another chapter would make the story as a whole worse.
This might all seem like I'm in favour of longer stories, and I suppose broadly I am, if written well. But
written well is the key part, not the length. It's perfectly possible to deliver all of the above sections in a 500-1000 word story. Less, if you're artful and good at the craft. You have to play on the readers' common understanding with you, imply a lot, and choose only those words that convey the maximum amount of understanding, but it's possible. What it is not, is a perfunctory description of personal attributes, and then to launch straight into the action.
Bella was a 26 year old girl, and her 44-26-44 body had massive tits. She was into bondage and went to a party.
At the party was a domme, all dressed in rubber with a whip. She grabbed Bella and strapped her to the cross. Then they...
<snip 20 paragraphs of wank material that describe in graphic detail all the bodily fluids, bondage and whipping, but somehow never describes how Bella feels about what's happening beyond "she was so wet from all this lesbian stuff">
...and then she sold her off as a slave!
That's not really a story. It's a description of some stuff that happened. It might be kinky, but it's not a story. It has characters and a setting,
just, but no real conflict or resolution, and only the thinnest of plots.
There's a tonne of material and opinions out there on what constitutes a story, but even at its most basic, it requires more than the above, or most readers will simply skim over it and then leave, disappointed.