My understanding is there are more fundamental reasons for why Go compiles faster, like how it handles "includes". And not supporting the C++ templating system

My understanding is there are more fundamental reasons for why Go compiles faster, like how it handles "includes". And not supporting the C++ templating system. And some things that slow down compiles are not to improve optimization. But to support complex, higher level language features. Go seems to hit a sweet spot of being highly expressive without slow compile times.