In most cases, a breaking tooling change should only impact the root project (e.g., they need to change their readme from `go get` to `go install`), so there's

In most cases, a breaking tooling change should only impact the root project (e.g., they need to change their readme from `go get` to `go install`), so there's only one codebase to fix and it's in the control of the person upgrading the tooling. Whereas, a breaking language change could impact transitive dependencies of the root project, which a developer doesn't have control over.