When resources are constrained. You may not like the language, but the problems you can solve with it are great: high frequency trading, music and video produc

When resources are constrained. You may not like the language, but the problems you can solve with it are great: high frequency trading, music and video production, photoshop, a web browser, anything on a smartphone. Which isn't to say that it's not possible to create a better language than C++ for those problems. They just haven't managed it yet (although Rust looks promising).