> Which somehow affects Go library developers stance on compaitbility and breaking things. The code written 10 years ago perfectly compiles and work on latest Go version, and it's such a wonderful experience.

I'm assuming you mean against go stdlib? Because sure as hell that's not my experience upgrading random go dependencies. Mostly use go in the Kubernetes/cloud ecosystem and upgrading the dependencies is an extremely painful exercise as most libraries seem to keep renaming and shuffling their APIs.