This is the size of the type declarations files (.d.ts files) that `tsc` pulls in when compiling your code. This is distinct from bundle size. Tree shaking is

This is the size of the type declarations files (.d.ts files) that `tsc` pulls in when compiling your code. This is distinct from bundle size. Tree shaking is a big win for bundle size. One of my big takeaways from looking at these visualizations is that we badly need an equivalent for type declaration files.