> when the rest of your tech is built on javascript/java/go
Where does this come from? This is a program being distributed to other people.
> And don't tell me development time will be remotely similar either.
It will be in my experience. I haven't felt like C++ slows me down in a long time. Modern C++ and STL vectors + hash maps is the vast majority of what you need. There is no memory management to be found, just moving variables when returning them from an inner scope.
Then you have a single binary that is incredibly fast on any modern computer and even many that aren't so modern any more.