[teraflop]

I think the main thing that's different about Go compared to more old-school languages is that the Go binary distribution includes the cross-compilers right out of the box. So anybody who can run "go build" can also cross-compile their application -- and, importantly, all of its library dependencies -- for any architecture that Go supports.

On the other hand, if you want to cross-compile a C program using GCC, you need to separately build and install a complete gcc+binutils toolchain for every individual arch that you want to target. And you have to handle the dependency management yourself, which may be tricky if your dependencies' build scripts weren't designed with cross-compilation in mind.