Re: C++?
Decades ago I was on a project where the use of ADA was mooted (to my relief nothing came of it - we didn't have the infrastructure for it, and btw I'm not a s/w specialist). Anyway I was at at conference where a professor of computing piped up from the front row to say (I paraphrase from memory) that in the long run everything would be written in C ; I assume by that he included C++ .