> Ironically the main thing keeping C++ relevant is the lack of a standard cross platform ABI.

I find that statement very odd, because in my experience the bane of C++, and perhaps the primary reason to look for alternatives, is C++'s lack of a standard ABI.

The lack of a stable ABI is C++'s main source of bit rot, and the main technical point that justifies migrating projects, even legacy ones, into other programming languages. If not for the ABI issue, most of the technical points used in favour of jumping away from C++ into some bandwagon of the moment would be moot.