But then what purpose would it serve? The last 30 years has brought no lack of new languages, not to mention evolution of older languages. Just use one of them.
The purpose of creating yet another language with Go was to break from what everyone else was doing, to see if a "simple" language would stop developers from playing with fun language toys all day to instead focus on actual engineering.
Numerous languages already got rid of C++ compile times. That didn't necessitate another one. Certainly Go wouldn't want C++ compile times any more than any other language, but as far as justifying its creation that would not be sufficient justification alone.
Legend has it that Go was conceived while waiting for a C++ program to compile, if that's what you are thinking of?
The purpose of creating yet another language with Go was to break from what everyone else was doing, to see if a "simple" language would stop developers from playing with fun language toys all day to instead focus on actual engineering.
Arguably it was successful in that.