I had a client that enforced writing every customer facing software in C++14. In 2024 they suddenly need to support various web technologies and modern web infrastructure. They still rely on their language limitations and don’t get stuff done any longer.

I advised to use Go and most developers were interested and even enthusiastic about it. We proved Go introduction by using it for simulators and testing. But finally the tech lead said "we will never ship anything different than C++ written applications".

My current client also works in embedded tech, but I proposed a polyglot approach and architecture. We ship apps in Go, Rust, C, C++ and even Fortran. Any developer can pick up any language as long as it compiles to Armhf. No one has a problem reading and at least maintaining any code.

There should only be technical limitations and constraints to force down your fellow developers.

Frameworks are a different topic. Web frameworks come and go, and most Angular shops I know became desperate legacy plumbing shops. Only use frameworks that you can replace easily or are willing and capable to maintain yourself.