I upgraded Firefox on a Pine64 laptop that brought in all the schmancy concurrent CSS handling that I'm assuming Rust made possible. It was like upgrading the

I upgraded Firefox on a Pine64 laptop that brought in all the schmancy concurrent CSS handling that I'm assuming Rust made possible. It was like upgrading the computer from a barely workable state to a pleasant browsing experience for $0. Could COBOL have been used instead to provide that same "set of rails" atop which Mozilla drove that concurrency development? To be clear-- I'm not asking if COBOL is turing complete. Mozilla could have coded all that in C++ if they wanted to. I'm asking if COBOL would have so clearly helped the devs reason about concurrency that it would have been worth the effort of adding a new language instead of writing it in C++.