Projects coded in Rust will remain in Rust, too. Projects coded in Go will remain Go. Projects in Java will remain Java. So, the advice above is just to avoid

Projects coded in Rust will remain in Rust, too. Projects coded in Go will remain Go. Projects in Java will remain Java. So, the advice above is just to avoid all languages (which, by the evidence, he does, seeming to know nothing meaningful about any). There is an exception, though. Projects in C have frequently transitioned to C++, often with great success, notably Gcc and Gdb.