You're being downvoted because writing Debian's system infrastructure in a language whose spec isn't finalized or is not well known is a Bad Idea when other options exist.
Python 2 -> Python 3 is a trivial port compared to adopting a new language and the technical/cultural baggage that come with it.
Python 2 -> Python 3 is a trivial port compared to adopting a new language and the technical/cultural baggage that come with it.