It does look highly doubtful. On the one hand, there are things like 10'000 and 1_blah notation that obvoiusly breaks backwards everything, plus completely nove

It does look highly doubtful. On the one hand, there are things like 10'000 and 1_blah notation that obvoiusly breaks backwards everything, plus completely novel mini languages, like the stuff inside lambda []. On the two hand, there is the overpowering insistence on the c++ abstract machine with its lifetimes that has resulted in monsters like bit_cast, and has no resemblance to actual hardware, living or deceased. So the feeling is more of an ideology driven developement than any practical considerations