For the Go team it is beneficial if more people/companies are using Go and possibly contributing back. Trying to force someone into a specific usage pattern (he

For the Go team it is beneficial if more people/companies are using Go and possibly contributing back. Trying to force someone into a specific usage pattern (here, open sourcing of all components) can be detrimental to it. Even if parts of your product might be open sourced, there often are good reasons for commercial software providers (either by selling software or the software being part of a sold product) not to open source their whole stack. Even GCC clearly states that programs compiled with it are not covered automatically by the GPL.