I hate having to make a choice on language at the onset of a new project. Each language has various great features for certain tasks.

I was wondering today why we cannot have some platform which would allow me to call across languages. If we take a basic example and say that I want to have Node/TS and Python files in a single system - what is the most ergonomic / efficient way to do this available today?

Why is this concept not more popular? Is this a bad idea?

If this is a good idea, what do we need to improve upon what is available today?