I disagree. Where I have worked, these important quantities have appeared thin-tailed:

- Size of pull requests (due to feedback loops)

- Effort required for bug fixes (the variation is large, but not a power law)

- Developer-hours in a sprint (this might seem obvious but it is still useful!)

- Weekly code complexity increase (counted as lines of code added)

- Fraction of effort spent on paying off technical debt

- Time taken by CI

- Weekly count of deployments

- Number of commits in a deployment

There are many more, but this should be enough to illustrate that software product development is not only subexponential.