After years of coding in one programming language, you will develop an ability to code anything in that language easily. Yes, the logic across the programming languages may remain the same, but choosing a different programming language will make you slower.
When it comes to business use cases, people expect your code to work in a correct and efficient manner. No one cares which programming language you have chosen (except other developers in your field).
Programming language matters only when you do something at high scale, such that you have ran out of all existing options to improve the performance in the current language. So, at this point in time, you may not have any other choice other than migrating your service which needs high performance to a different language. You don’t have to migrate the entire code, you can just migrate a service that needs really high performance.
The majority of the software projects won’t be working at that scale. Don’t assume the project that you will build will be used by billions of people. You don’t need to care about programming language when 1000 people are using your software. There is no point in it. The slowest of slowest programming languages will still be quick. I am bored of the programming language debate.
I love JavaScript, TypeScript and now I am looking at Python too. These programming languages are really simple and just beautiful.