Having official status, means anyone coding for the said platform can be confident that everything related to the platform infrastructure (IDE, libraries, debuggers, documentation, discussion forums, build systems) will take into account the language.
Anything that is just 3rd party will have integration issues, as one needs to rely on the language community to step up to sort them out, or even left in a zombie state as interest fades away.
Having official status, means anyone coding for the said platform can be confident that everything related to the platform infrastructure (IDE, libraries, debuggers, documentation, discussion forums, build systems) will take into account the language.
Anything that is just 3rd party will have integration issues, as one needs to rely on the language community to step up to sort them out, or even left in a zombie state as interest fades away.