Google treat consumer products differently to commercial services and Open Source projects. If there is a significant breaking change I suspect that they will h

Google treat consumer products differently to commercial services and Open Source projects. If there is a significant breaking change I suspect that they will handle it more like they handled the Angular 1 transition, where they monitored demand, and then provided a sunset period. This assumes that Go 2 does have significant breaking changes, which the Go team have explicitly said that they do not want to do. The current view seems to be that they will feed new features into Go 1 releases as opt-ins, in the same ways that modules is an opt-in feature that will become opt-out in some future Go 1 release.