Clang's Slow Development

Clang development is a bit stalled because of how quickly it gets new features. Microsoft Compilers are often the first one to implement something like deducing this for example. We don't want to bet only on clang and we want to provide a competition in for that. have a few magical keywords but I suppose most of those you can work around or are already supported by clang as most clang supports everything so that's interesting.