I don't get it. I'm primarily a Python developer, so this looks like Celery to me. I've never understood why I'd want to tie myself to a particular library, rat

I don't get it. I'm primarily a Python developer, so this looks like Celery to me. I've never understood why I'd want to tie myself to a particular library, rather than encode messages to an agreed encoding, then write workers in the technology most appropriate for the job?