"It also adds support for the latest C and C++ standards, marking a first step towards the introduction of modern C++ concepts into ReactOS"
https://reactos.org/project-news/rosbe-22-released/
What you write is truth but it doesn't apply to kernel.
"It also adds support for the latest C and C++ standards, marking a first step towards the introduction of modern C++ concepts into ReactOS"
https://reactos.org/project-news/rosbe-22-released/