The number they consider conservative is that TypeScript can address up to 15% of public bugs. That's a different number than the proportion of public bugs found ts-undetectable because they're not type errors at all.
There are so many important details about what this figure means and how accurate it is.
Would it make a difference if TypeScript was used before the code was committed? How does the subject domain of the project impact this figure? How do other testing and review approaches impact this number? Are public bugs of certain kinds more likely to be reported for certain projects?
It's highly misleading to quote this figure in such a simplistic manner without caveats.
Would it make a difference if TypeScript was used before the code was committed? How does the subject domain of the project impact this figure? How do other testing and review approaches impact this number? Are public bugs of certain kinds more likely to be reported for certain projects?
It's highly misleading to quote this figure in such a simplistic manner without caveats.