> Except MSVC is far ahead of Clang[1] (and leagues ahead of Apple Clang) when it comes to C++ standards conformance.
I feel this is a red herring.
People use AppleClang because it ships with Xcode and is integrated with it. Those who are stuck with Xcode will not choose msvc's support for C++20 as a good enough reason to drop everything.
With Clang, the main differences with MSVC boil down to a couple of minor features that are hardly showstoppers, such as simplifying implicit lambda captures.
Between being able to use clang and all it's tooling and being stuck with msvc, using clang is far above in importance.
I feel this is a red herring.
People use AppleClang because it ships with Xcode and is integrated with it. Those who are stuck with Xcode will not choose msvc's support for C++20 as a good enough reason to drop everything.
With Clang, the main differences with MSVC boil down to a couple of minor features that are hardly showstoppers, such as simplifying implicit lambda captures.
Between being able to use clang and all it's tooling and being stuck with msvc, using clang is far above in importance.