I have a hard time imagining Go really reaching the niche you've described such that it has a chance at satisfying it. Million line codebases don't appear out

I have a hard time imagining Go really reaching the niche you've described such that it has a chance at satisfying it. Million line codebases don't appear out of nowhere: the language has to be useful and natural enough that developers want to continue working on a project in it until it reaches that size. That being said, plenty about Go seems to make it easier to get there: the lack of reasonable tools for abstraction certainly makes copy-paste programming much more likely, along with the ensuing explosion in LOC.