What compounds and what just looks like it does
A lot of things grow over time. Not all of them compound.
Followers grow. They don't compound. The ten-thousandth follower doesn't make the next thousand easier to acquire. They just make the number bigger. Each new follower is roughly as much work as the last one.
Reach grows. It doesn't compound. A viral post doesn't make the next post easier to write. The audience moves on the moment the algorithm does.
Content volume grows. It doesn't compound. The hundredth blog post doesn't make the hundred-and-first more valuable. Just more content in the pile.
These look like compounding because the number goes up. They aren't compounding, because the value-per-unit doesn't change. You're stacking units, not building something where the units make each other more useful.
What actually compounds:
Decision quality. Each decision you log makes the next one slightly easier and slightly more grounded. The hundredth decision benefits from the previous ninety-nine in a way the first didn't.
Taste. Every piece of work you scrutinize sharpens what you'll accept the next time. Year five of editing your own work is qualitatively different from year one. Same effort, better output.
Relationships. A two-year relationship is not twice as valuable as a one-year relationship. It's exponentially more valuable, because the trust built over time creates options that didn't exist before.
Code that's been used in production. Code that has survived users for two years is a different artifact than code that's six months old. It's been pressure-tested, hardened, simplified. It's compounding.
A body of written work indexed online. A hundred essays cross-referenced and discoverable is not a hundred essays. It's a hundred essays times the connections between them. Network effects, but with your own thinking.
The test for whether something compounds: does the previous unit make the next unit more valuable, or just add to the pile?
If it just adds to the pile, you're stacking, not compounding. Stacking is fine. It just isn't going to produce the asymmetric outcome you think it will.
Spend less time on what stacks. Spend more time on what compounds. The difference between the two is the difference between a busy career and a great one.