I love how folks worship GCC and clang compiler extensions as C and C++ or UNIX compiler vendors in general, including embedded RTOS toolchains, but when Microsoft does it, for whatever reason doesn't count.
I certainly don't "worship" any compiler, and am pretty quick to point out non-standard extensions in people's code. But C++/CLI goes far, far beyond extensions, and becomes a completely different language to C++, both syntactically and semantically.
Just like Linux kernel can only be compiled with GCC, or compilers that equally implement the same language extensions that aren't at all C, not being part of C23 ISO/IEC 9899:2024, including compiler switches that change C semantics as strict provenance.
If you want to further discuss what is what, lets see how up to date is your ISO knowledge, versus the plethora of extensions across C and C++ compilers.
Two weights, two measures.