Would you be interested in trying to grow any of these? None of the moderators seem to be active.
I might prefer to avoid ml for political reasons, though. Are you able to get the kbin posts to federate to your instance? I subscribed to it, but don't see any posts on my instance yet.
Another option would be to create a new community, perhaps with a more general name like c/autonomousvehicles or c/autos. Thoughts?
Let me try and find two dedicated news sources to add to my RSS aggregator, as without a steady influx of new posts, any new community will just stagnate.
As for where it's hosted, I don't mind ml at all, in fact all of my interactions with the developers and moderators have been favourable. That said, there's probably more appropriate instances for such a community. As long as it's not on world (just because I don't like Lemmy being centralised), I don't mind where it is.