I work with both, and while I also don't like the pace Java gets its improvements, I understand them, given how many companies allow us to update to modern versions.

My work computer has Java 9, .NET 4.7.1 and C++17 compilers installed.

Usually I get to deploy on Java 8 (only allowed last year), .NET 4.5 (as of last year) and C++ enterprise code looks mostly C with C++ compiler.

So I don't mind the slow pace, given that I can only use the very latest features on private projects.