@No1 I don't believe any such 'death spiral' exists. Starlink is a last resort due to cost and latency. It's better than a broken cabled feed. 5G suffers from limited area availability and time slice contention when more users are added, as is the case with all wireless systems.
NBN FTTH is an unbeatable value and a total performance beast. @zurohki
@zurohki You can get 1000/400 if you really need it. Speed costs money, typically $9.00/day (Launtel). The use case for more than 50Mbps upload is limited.