I think I’m probably out if my depth answering here, however what would be the main difference between hosting it on a (local) server vs on HA? As long as it is reachable from HA, it doesn’t make much difference as to ware it is being run.
However if we assume that not everyone has a self-hosted server or something, then I think it would be a great addon to run on HA as an add-on.
Also, take a look at this thread, I think kotrfa might have a more educated opinion.