Yeah, that number sounded a bit too high 😅
Although it should have lost more than 4kB, somewhere in the 20%-25% wheelhouse. Are you bundling the development build/does your bundler add a `production` exports condition?
Nice! Btw the release points to the wrong codemod, seems like it should be `@apollo/client-codemod-migrate-3-to-4` :) The one in the docs give a 404 on install.