We occasionally use C++, but instead of the holistic approaches that tend to be discussed with everything in language X, we just write a native library that is then safely used from Java/.NET.
Basically what everyone usually advocates as "Python" in performance critical stuff, but we get the the productivity and JIT/AOT tooling from Java/.NET eco-system as well.
I think you have to specify a domain to make that statement reasonable. I think .NET is used more than Go for example. Maybe more than NodeJs also for server systems. Less than Java. If we compare to C++ it is very much down to domains. I don't hear about many enterprises using C++ for server backend code but of course they exist. And so on. .NET (or C#) may already be "leading" against a lot of other languages and then the question is if the others will replace C# or not. And if it will take some of the market from languages like Java which I think it will but not all.