Agree to this, we also need
@ThinkServerless frameworks that are inclusive of many different languages in a single project. Lambda functions are helping teams be open to multiple languages. I agree with you, loyalty should be towards quality product and not towards a language.
Programming has become a some kind of religion. People tend to believe strictly in one language.
While I also have my favorite, I am always open to others and to use the best for the given problem.
Do not get stuck in one language or framework, the mindset is more important!