Most of these features have been used by countless C++ developers for the past decades -- I really don't see the point in adopting a language that's mostly C++ but without some of the warts. Either pick C++ or something like Rust.
C++ is fine, but it's insanely slow to compile.
I generally like C++, but I could trade anything to make it faster to compile, and most of the time, I just use a small subset of C++ that I feel okay with.