Exactly. Give it a couple of releases and the default "for new installations" will be On. Two more releases and all other installs will be opted in. Classic pattern for shoveling stuff down the throat of resisting gray masses.
> The Go trademark and the Go Logo ( ) – collectively, the “Go Trademarks” – are trademarks of Google and are treated separately from the copyright license grants contained in the BSD-licensed Go repositories, as described below.
> Substantially unmodified distributions¶
> Substantially unmodified distributions may use the Go Trademarks if the derivative work complies with the terms of the Go programming language’s open source license and is made in a good faith attempt to replicate the quality and substance of the original project.
> Examples of modifications that would be considered substantially unmodified include language translation and localization, bug and security patches, and necessary interoperability/compatibility modifications.
> The Go Trademarks may be used in connection with such substantially unmodified distributions following the “Naming Conventions for Authorized Uses”.
> Substantially modified distributions may include explicit changes to functionality, interfaces, or features.
They can modify these trademark terms later too with a "backwards incompatible" change:
> Guideline Version¶
> These Trademark Guidelines are version 1.0 and may be followed by subsequent versions. These Guidelines may be edited for clarity; the major version will be increased when changes introduce new requirements, define new criteria, or otherwise present a backwards incompatible change.