Yeah, there hasn't been any confirmation of re-infection, which is why I said "reports" and "if true".
In an ideal world we can get it low enough to contain what we've got via track-and-trace, which will still mean closed borders one would assume. Tasmania's numbers probably allow for that already, I'm not sure if any of them are out in the wild. NSW is a long, long way from normal life.
The issue for me is they only say "State X has Y cases", which in itself is meaningless. For example, Tasmania recorded 11 new cases overnight. Eight were from people getting off cruise ships. Assuming they were appropriately quarantined the risk to the larger Tasmanian population hasn't actually increased as a result of those eight.
Focus on whether or not there's been recorded community transmission is silly, especially since we were only testing those who had been overseas initially so of course they weren't going to record a community transmission. The question is people who were out in the community at any point while they had the virus. If the only cases in a given state were people who were under quarantine before arrival, the risk to anyone else in that state is zero regardless of how many cases they actually have. If there is only one recorded case but that person has been out in public or interacted with anyone at all, then everyone is at risk.