While others has spoken finely about why you really consider carefully about microservices approach (recently popular opinion has moved toward modular monolith, even among microservices proponent like Sam Newman), i want to focus if you decide to do microservices approach, how do you decide between elixir/python/golang?
Each of the language has it’s strong point and weak point, you would need to consider which of the language suit your problem domain + context the best.
IMO,
Elixir has it’s strong suit on correctness + robustness + general productivity, example problem domain it shine is communication (WhatsApp), blockchain/web3 tech, and rapid application development
GoLang has it’s strong suit on low level/binary manipulation + fast performance + tooling support, example problem domain it shine is CLI tools, binary level work (video/streaming encoding), gRPC based microservice.
Python has it’s strong suit in it’s large amount of library (especially data based library) + general productivity, example problem domain it shine is machine learning, and rapid application development
Context is things like company culture and developer general skill. for example some company is invest heavily on JVM, so usually when they introduce new language, it’s a language which are supported on JVM (like clojure/scala/kotlin).
