If Go is so awesome, why are Go developers still using C in their toolchain? That's a terrible argument. Of course it takes effort to port existing application

If Go is so awesome, why are Go developers still using C in their toolchain? That's a terrible argument. Of course it takes effort to port existing application and tools. In some cases, it might be worth it and in some cases, it might not be. Python 2.7 will always be available to run such tools and applications. This is very different from the case of library developers that should port their libraries to Python 3 (or support both Python 2 and 3, this is not difficult) so that it's accessible to more code. This isn't an argument at all when it comes to writing new stuff in Python 3.