This is one of a number of replies to modern C++ not being a good match for modern game development needs.
https://news.ycombinator.com/item?id=18777735
I think this is quite an exciting time for realtime software development.
Moore's Law petered out, at least for single core. and our tools haven't changed much since the 90s. Now we're able to pull away from C++ into languages that are safer and faster to iterate with, while giving up none of the efficiency - in fact we can gain speed ups. .